CN109001064A - A kind of method of quantitative measurment and evaluation preform polishing effect - Google Patents
A kind of method of quantitative measurment and evaluation preform polishing effect Download PDFInfo
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- CN109001064A CN109001064A CN201810966996.XA CN201810966996A CN109001064A CN 109001064 A CN109001064 A CN 109001064A CN 201810966996 A CN201810966996 A CN 201810966996A CN 109001064 A CN109001064 A CN 109001064A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
- G01N3/46—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid the indentors performing a scratching movement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
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Abstract
The present invention provides the method for a kind of quantitative measurment and evaluation preform polishing effect, comprising steps of S1, indentation: according to the functional relation of hardness tester loading force F and width of nick hIn preform surface etch and record one group of different depth h1‑hmIndentation；S2, polishing: one group of difference width of nick h will be had1‑hmPreform be placed in polissoir and be processed by shot blasting；S3, detection: remaining most scotch depth is h after the polishing of detection fiber prefabricated rodsn, obtain practical polishing depth h of the preform in polishing treatmentx；S4, evaluation: depth h is polished by practicalxWith target polished depth h0Comparison, according to evaluation of result polishing effect.The technical issues of present invention solves in the prior art, and preform polishing depth is difficult to quantitative measurment, lacks adjustment foundation；This method can be used as the foundation of burnishing parameters adjustment, to greatly improve polishing efficiency and quality of finish, have good practical value and economic benefit.
Description
Technical field
The present invention relates to optical fiber preparation technical field more particularly to a kind of quantitative measurments and evaluation preform polishing to imitate
The method of fruit.
Background technique
In the manufacturing process of the optical fiber preform, the sandwich layer of doping can be usually prepared first, then in sandwich layer external sediment one
The covering of layer high-purity silicon dioxide.Cladding index is lower than sandwich layer, is the base of fibre-optic waveguide structure after preform drawing
Plinth.Progress in sintering furnace is typically put into after the completion of covering deposition, and processing makes silica dust vitrifying in next step, and output is preliminary
Molding preform.
In the entire production process of the above preform, preform surface may operate because of personnel, set
There are the abnormal conditions such as scratch, the insufficient burnt whiting of dirty, bubble or surface in the reasons such as standby or material.Lead to that fiber strength is poor, declines
The negative effect of lapse rate height or other performance parameters exception.
Therefore, in the manufacturing process of the optical fiber preform, outside usually using the fuel gas of big flow to preform
Surface is processed by shot blasting, or is handled using means such as organic solvent cleaning, acid solution corrosion, removes the defect on surface to mention
Optical fiber quality after rising wire drawing.And polishing can inherently reduce preform weight, therefore polishing process will reach
Enough polishing depth, the quality of the optical fiber after ensureing polishing, and unsuitable polishing time is too long, to reach energy-efficient mesh
's.But it is capable of the method for quantitative measurment polishing effective depth due to lacking at present, rely on experience in actual operation more
It adjusts, adjustment is more difficult.
Summary of the invention:
It is an object of the present invention to provide a kind of quantitative methods with evaluation preform polishing effect, to solve existing skill
The technical issues of in art, preform polishing depth is difficult to quantitative measurment, lacks adjustment foundation, to greatly improve polishing effect
Rate and quality of finish.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of method of quantitative measurment and evaluation preform polishing effect, comprising the following steps:
S1, indentation: according to the following functional relation of hardness tester loading force F and width of nick h
Wherein k and μ value is constant, and the value that the load force of hardness tester is set separately is F1、F2、F3、……Fm, in optical fiber prefabricating
Stick surface multiple etching and the depth for obtaining one group of corresponding load force are h1、h2、h3……hmIndentation；
S2, polishing: it is h that one group of width of nick will be had in the step S11-hmPreform be placed in polissoir
In be processed by shot blasting；
S3, detection: residual after the polishing of detection fiber prefabricated rods for the preform after polishing treatment in the step S2
The most scotch depth h stayedn, obtain practical polishing depth h of the preform in polishing treatmentx, i.e. hn-1< hx< hn；
S4, evaluation: the practical polishing depth h of acquisition will be calculated in the step S3xWith target polished depth h0Comparison, root
Polishing effect is evaluated according to comparing result.
Preferably, in the step S1, by h1、h2、h3……hmIt is set as the arithmetic progression that one group of difference is γ, is made
Target polished depth h0Between h1-hmBetween, γ value is smaller, then the result precision measured is higher.
Preferably, the hardness tester in the step S1 further includes diamond penetrator and load force measuring instrument, the diamond
Pressure head corresponds to the indentation of depth in different load forces in preform surface etch.Since diamond hardness is much larger than optical fiber
Prefabricated rods, in process of press in, pressure head deformation quantity itself is negligible.
Preferably, the diamond penetrator end in the step S1 is rectangular pyramid, spherical shape or cone.A large amount of previous experiments
Data comparison discovery, the operability and effect of the positive rectangular pyramid pressure head of Vickers are best.
Preferably, the step of obtaining formula (1) in the step S1 is as follows: using diamond pressure of different shapes first
Head carries out multiple etching to preform respectively, while etching corresponding load force F every time by the determination of load force measuring instrument,
The numerical value of multiple width of nick h is obtained by calculating in conjunction with indenter shape and indentation size；Finally to multiple width of nick h and right
It answers the experimental data between load force F to carry out Function Fitting, obtains formula (1)It is wherein different
The corresponding constant k and μ value obtained in formula (1) of the pressure head of shape is different.
Preferably, the hardness tester in the S1 step is vickers hardness tester, and pressure head is positive rectangular pyramid pressure head, according to following step
It is rapid to obtain formula (1)
A1, indentation: multiple squares are extruded on preform surface using the pressure head of the positive rectangular pyramid of vickers hardness tester and are carved
Trace, while hardness tester records the corresponding load force F of indentation1、F2、F3、……Fn；
A2, calculate width of nick: the catercorner length of square indentation is d, according to pressure head geometry, show that indentation is deep
It is constant that the functional relation for spending h and indentation catercorner length d, which is h=λ d, λ,；D is much smaller than preform diameter D, it is possible to
Default knurl is plane square shape, ignores the unevenness in sample cylinder face；
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, by different width of nick h1、
h2、h3……hnWhen corresponding loading force F1、F2、F3、……FnIt is included in table；
A4, formula (1) is obtained: by the table number of multiple and different width of nick h and corresponding loading force F in the step A3
According to Function Fitting is carried out, the functional relation formula (1) of hardness tester loading force F and width of nick h are obtainedWherein k
For constant, i.e.,Wherein k is constant and μ=0.
Preferably, the hardness tester in the S1 step is Rockwell hardness instrument, and pressure head is circular cone pressure head, is obtained in accordance with the following steps
It obtains formula (1)
A1, indentation: multiple circular score lines are extruded on preform surface using the circular cone pressure head of Rockwell hardness instrument, simultaneously
Hardness tester records the corresponding load force F of indentation1、F2、F3、……Fn；
A2, calculate width of nick: the diameter of circular score line is d, according to pressure head geometry, obtains compression distance h and carves
The functional relation of trace diameter d is that h=λ d, λ are constant；D is much smaller than preform diameter D, it is possible to default knurl
For planar rondure, ignore the unevenness in sample cylinder face.
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, when by different width of nick h
Corresponding loading force F is included in table；
A4, formula (1) is obtained: by multiple and different width of nick h in the step A31、h2、h3……hnIt is carried with corresponding
Load forces F1、F2、F3、……FnList data carry out Function Fitting, the function for obtaining hardness tester loading force F and width of nick h closes
It is formula formula (1)Wherein k is constant, i.e., Wherein k is constant and μ=0.
Preferably, the hardness tester in the S1 step is knoop hardness tester, and pressure head is the gold that opposite rib angle is respectively α, β
Hard rock rectangular pyramid pressure head obtains formula (1) in accordance with the following steps
A1, indentation: multiple diamond shape indentations are extruded on preform surface using the pressure head of knoop hardness tester circular cone, simultaneously
Hardness tester records the corresponding load force F of indentation1-Fn；
A2, width of nick: the catercorner length d of diamond shape is calculated1、d2Wherein d the larger value is obtained according to pressure head geometry
The functional relation of compression distance h and indentation diameter d is that h=λ d, λ are constant；D is much smaller than preform diameter D, it is possible to
Default knurl is plane diamond shape, ignores the unevenness in sample cylinder face.
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, when by different width of nick h
Corresponding loading force F is included in table；
A4, formula (1) is obtained: by the list data of different width of nick h and corresponding loading force F in the step A3,
Function Fitting is carried out, the functional relation formula (1) of hardness tester loading force F and width of nick h are obtainedWherein k is
Constant, i.e.,Wherein k is constant and μ=0.
Preferably, the hardness tester in the S1 step is Rockwell hardness instrument, and pressure head is the diamond spherical pressure that radius is r
Head obtains formula (1) in accordance with the following steps
A1, indentation: the pressure head of Rockwell hardness instrument spherical shape is used to extrude multiple diameters on preform surface as the circle of d
Indentation, while hardness tester records the corresponding load force F of indentation1-Fn；
A2, it calculates width of nick: according to pressure head geometry, obtaining compression distance h and the functional relation of indentation diameter d isR is spherical indenter radius；D is much smaller than preform diameter D, it is possible to default indentation shape
Shape is planar rondure, ignores the unevenness in sample cylinder face.
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, when by different width of nick h
Corresponding loading force F is included in table；
A4, formula (1) is obtained: by the list data of different width of nick h and corresponding loading force F in the step A3, into
Line function fitting, obtains the functional relation formula (1) of hardness tester loading force F and width of nick h
Wherein k and μ value is constant.
Preferably, the hardness tester is equipped with camera, and preform is found and recorded to camera in the step S3
On pressure head indentation trace.
Preferably, which is characterized in that the method for the quantitative measurment and evaluation preform polishing effect is suitable for can
Combustion gas body, organic solvent cleaning or acid solution forms of corrosion are processed by shot blasting preform outer surface.
Preferably, further comprising the steps of after the step S4: S5, adjusting parameter: according to the comparison of the step S4
As a result, after one or more of burnishing parameters of adjustment polissoir, using unpolished preform, according to the step
Rapid operating procedure of the S1 into S4 is processed by shot blasting and measures, and makes the practical polishing depth h of preformxIt is greater than or equal to
Target polished depth h0Namely hx≥h0, while polishing efficiency is improved, energy consumption cost is reduced, the tune of burnishing parameters is completed.
Preferably, which is characterized in that the formula (1) in the step S1For not
Same optical fiber prefabricating stick cladding hardness, corresponding k with μ value are different.
The invention has the following advantages:
The present invention provides a kind of methods of quantitative measurment preform polishing effect, solve in the prior art, light
The technical issues of fine prefabricated rods polishing depth is difficult to quantitative measurment, lacks adjustment foundation；It, can referring to this method data obtained
As the foundation of burnishing parameters adjustment, to greatly improve polishing efficiency and quality of finish, there is good practical value and warp
Ji benefit.In actual operation, if practical polishing depth is greater than target value, can appropriate adjustment parameter, save raw material, promoted plus
Work efficiency rate；If practical polishing thickness is less than target value, appropriate adjustment parameter is needed to guarantee the quality for meeting subsequent wire drawing with this.
Detailed description of the invention
Fig. 1 is the flow chart of quantitative measurment preform polishing effect method of the invention；
Fig. 2 is to be further applied load the schematic diagram of power using positive rectangular pyramid pressure head to preform in embodiment 1；
Fig. 3 is to be further applied load the schematic diagram of power using circular cone pressure head to preform in embodiment 2.
Specific embodiment
Illustrate selected embodiment of the invention referring now to specification, those skilled in the art are according to the present invention of the disclosure
Embodiment subordinate explanation be merely exemplary, the scheme being not meant to limit the present invention.
Core of the invention is to provide the method for a kind of measurement and evaluation preform polishing effect, and this method passes through benefit
The indentation and label of different depth are etched on preform with hardness tester, the sight after as a result polishing, to residual indentation trace
The depth correlation examined and marked before, and then polishing depth is obtained, depth and target polished depth correlation then are polished by practical,
Evaluation and guide parameters adjustment are carried out to polishing.Wherein the pressure head of hardness tester can be different shape, with positive the four of vickers hardness tester
Pyramid pressure head effect is optimal.This method is suitable for different polishing processes, such as oxyhydrogen flame calcination, organic solvent or pickling, this
Specific implementation method is described in detail by taking the oxyhydrogen flame calcination polishing treatment of preform as an example.
Embodiment 1
The method flow diagram of quantitative measurment preform polishing effect shown in Figure 1, with positive the four of vickers hardness tester
For pyramid pressure head and oxyhydrogen flame calcination polishing process, quantitative measurment preform polishing effect method of the invention is illustrated.
The method of the quantitative measurment preform polishing effect of the present embodiment 1, comprising the following steps:
S1, indentation: according to the functional relation of formula (1) hardness tester loading force F and width of nick hWherein
K value is constant 2.3 × 10-3, in preform surface etch and one group is recorded using the positive rectangular pyramid pressure head of vickers hardness tester
The indentation of 10 μm of -50 μm of depth, at interval of 5 μm of quarters, one point, totally 9 points, and the successively position of record indentation point.It is plurality of
Width of nick and the corresponding relationship of loading force are as shown in table 1.
The tables of data of table 1 different width of nicks and corresponding load force
| F(N) | h(μm) |
| 18.90 | 10.00 |
| 42.54 | 15.00 |
| 75.61 | 20.00 |
| 118.15 | 25.00 |
| 170.23 | 30.00 |
| 231.56 | 35.00 |
| 302.47 | 40.00 |
| 382.82 | 45.00 |
| 472.59 | 50.00 |
S2, polishing: different width of nick h will be had in the step S11-h9Preform be placed in hydrogen-oxygen flame polish
In equipment, burnishing parameters hydrogen flowing quantity 200-300slm, oxygen flow 100-150slm, polishing velocity 10-15mm/min are set,
Subtract fire-cooling procedure by hanging stick-igniting-increasing fire-and polishing into stick-and be processed by shot blasting；
S3, detection: for the preform after polishing treatment in the step S2, camera detection is carried with hardness tester
To polishing trace h6-h9, then practical polishing depth is between h5-h6Between, i.e. 30 μm of < hx35 μm of <；
S4, evaluation: depth h is polished according to the optical fiber target that scratch, bubble, dirty etc. determine0=34 μm, by the step
The practical polishing depth h of acquisition is calculated in rapid S3xWith target polished depth h0Comparison, is not able to satisfy hx≥h0, prompt practical polishing
Depth miss the mark depth, polishing effect are insufficient.
S5, adjusting parameter: according to the comparing result of the step S4, prompt polishing depth deficiency that need to carry out to burnishing parameters
Adjustment.Using unpolished preform, increase the hydrogen or oxygen gas flow of polissoir, hydrogen on the basis of parameter before
Flow increases 25slm, and oxygen flow increases 12.5slm, and polishing velocity reduces 2mm/min, according to the step S1 into S4
Operating procedure is processed by shot blasting and measures again, and hardness tester carries camera detection to polishing trace h7-h9, then practical polishing
Depth is between h6-h7Between, i.e. 35 μm of < hx40 μm of <, at this point, practical polishing depth hxMeet and is greater than or equal to target polished depth
Spend h0Namely hx≥h0, prompt quality of finish to achieve the desired results, complete the adjustment of burnishing parameters.
Shown in Figure 2, the hardness tester in step S1 is vickers hardness tester, and pressure head is that two opposite face angles are 136 degree
Positive rectangular pyramid pressure head, obtains formula (1) in accordance with the following steps
A1, indentation: multiple squares are extruded on preform surface using the pressure head of the positive rectangular pyramid of vickers hardness tester and are carved
Trace, while hardness tester records the corresponding load force F of indentation1、F2、F3、……Fn；
A2, calculate width of nick: the catercorner length of square indentation is d, according to pressure head geometry, show that indentation is deep
The functional relation for spending h and indentation catercorner length d is h=λ d,D is much smaller than preform diameter D, so
It is plane square shape that knurl, which can be defaulted, ignores the unevenness in sample cylinder face.
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, by different width of nick h1、
h2、h3……hnWhen corresponding loading force F1、F2、F3、……FnIt is included in table；
A4, formula (1) is obtained: by the table number of multiple and different width of nick h and corresponding loading force F in the step A3
According to Function Fitting is carried out, the functional relation formula (1) of hardness tester loading force F and width of nick h are obtained
Embodiment 2
The method flow diagram of quantitative measurment preform polishing effect shown in Figure 1, with the circular cone of Rockwell hardness instrument
For pressure head and oxyhydrogen flame calcination polishing process, quantitative measurment preform polishing effect method of the invention is illustrated.
The method of the quantitative measurment preform polishing effect of the present embodiment 2, comprising the following steps:
S1, indentation: according to the functional relation of formula (1) hardness tester loading force F and width of nick hWherein
K value is constant 2.8 × 10-3, using the circular cone pressure head of Rockwell hardness instrument in preform surface etch and one group 10 μm of record-
The indentation of 50 μm of depth, at interval of 5 μm of quarters, one point, totally 9 points, and the successively position of record indentation point.Plurality of difference
Width of nick and the corresponding relationship of loading force are as shown in table 2.
The tables of data of table 2 different width of nicks and corresponding load force
| F(N) | h(μm) |
| 12.76 | 10.00 |
| 28.70 | 15.00 |
| 51.02 | 20.00 |
| 79.72 | 25.00 |
| 114.80 | 30.00 |
| 156.25 | 35.00 |
| 204.08 | 40.00 |
| 258.29 | 45.00 |
| 318.88 | 50.00 |
S2, polishing: different width of nick h will be had in the step S11-h9Preform be placed in hydrogen-oxygen flame polish
In equipment, burnishing parameters hydrogen flowing quantity 200-300slm, oxygen flow 100-150slm, polishing velocity 10-15mm/min are set
Subtract fire-cooling procedure by hanging stick-igniting-increasing fire-and polishing into stick-and be processed by shot blasting；
S3, detection: for the preform after polishing treatment in the step S2, camera detection is carried with hardness tester
To polishing trace h8-h9, then practical polishing depth is between h7-h8Between, i.e. 40 μm of < hx45 μm of <；
S4, evaluation: depth h is polished according to the optical fiber target that scratch, bubble, dirty etc. determine0=33 μm, by the step
The practical polishing depth h of acquisition is calculated in rapid S3xWith target polished depth h0Comparison, as a result shows practical polishing depth hxMeet big
In or equal to target polished depth h0Namely hx≥h0, quality of finish is prompted to achieve the desired results.
S5, adjusting parameter: according to the comparing result of the step S4, prompting quality of finish although to achieve the desired results, but
It is that the energy consumption of polishing and polishing efficiency are not optimal, burnishing parameters can be adjusted and be polished deeply with appropriate reduction
Degree.Using unpolished preform, the hydrogen or oxygen gas flow of polissoir, hydrogen stream are reduced on the basis of parameter before
Amount reduces 25slm, and oxygen flow reduces 12.5slm, and motor increases 5mm/min into rod speed, according to the step S1 into S4
Operating procedure be processed by shot blasting and measure again, hardness tester carry camera detection to polish trace h7-h9, then practical to throw
Optical depth is between h6-h7Between, i.e. 35 μm of < hx40 μm of <, at this point, practical polishing depth hxMeet and is greater than or equal to target polished
Depth h0Namely hx≥h0, prompt quality of finish achieve the desired results, and compared with parameter adjustment before, saved the energy, improved throwing
Light efficiency completes the adjustment of burnishing parameters.
Shown in Figure 3, the hardness tester in step S1 is Rockwell hardness instrument, and pressure head is that coning angle is 120 degree, top spherical surface
Radius is the circular cone pressure head of 0.2mm, obtains formula (1) in accordance with the following steps
A1, indentation: multiple circular score lines are extruded on preform surface using the circular cone pressure head of Rockwell hardness instrument, simultaneously
Hardness tester records the corresponding load force F of indentation1、F2、F3、……Fn；
A2, calculate width of nick: the diameter of circular score line is d, according to pressure head geometry, obtains compression distance h and carves
The functional relation of trace diameter d is h=λ d,D is much smaller than preform diameter D, it is possible to default indentation shape
Shape is planar rondure, ignores the unevenness in sample cylinder face.
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, when by different width of nick h
Corresponding loading force F is included in table；
A4, formula (1) is obtained: by multiple and different width of nick h in the step A31、h2、h3……hnIt is carried with corresponding
Load forces F1、F2、F3、……FnList data carry out Function Fitting, the function for obtaining hardness tester loading force F and width of nick h closes
It is formula formula (1)
From embodiment 1 and embodiment 2 as can be seen that the present invention provides a kind of quantitative measurment preform polishing effects
Method, the foundation that the data that can be obtained in this way are adjusted as burnishing parameters, have good practical value and economy
Benefit.It in actual operation, can appropriate adjustment parameter, saving raw material, promotion processing if practical polishing depth is greater than target value
Efficiency；If practical polishing thickness is less than target value, appropriate adjustment parameter is needed to guarantee the quality for meeting subsequent wire drawing with this.
Finally it should be noted that above embodiments are merely to illustrate the technical solution of the application rather than to its protection scope
Limitation, although the application is described in detail referring to above-described embodiment, the those of ordinary skill in the field should
Understand: those skilled in the art read the specific embodiment of application can still be carried out after the application various changes, modification or
Equivalent replacement, but the above change, modification or equivalent replacement, in the application wait authorize or the claim of issued for approval protection model
Within enclosing.
Claims (10)
1. a kind of method of quantitative measurment and evaluation preform polishing effect, which comprises the following steps:
S1, indentation: according to the following functional relation of hardness tester loading force F and width of nick h
Wherein k and μ value is constant, and the value that the load force of hardness tester is set separately is F1、F2、F3、……Fm, in preform
Surface multiple etching and the depth for obtaining one group of corresponding load force are h1、h2、h3……hmIndentation；
S2, polishing: it is h that one group of width of nick will be had in the step S11-hmPreform be placed in polissoir into
Row polishing treatment；
S3, detection: remaining after the polishing of detection fiber prefabricated rods for the preform after polishing treatment in the step S2
Most scotch depth hn, obtain practical polishing depth h of the preform in polishing treatmentx, i.e. hn-1< hx< hn；
S4, evaluation: the practical polishing depth h of acquisition will be calculated in the step S3xWith target polished depth h0Comparison, according to right
Than evaluation of result polishing effect.
2. the method for quantitative measurment according to claim 1 and evaluation preform polishing effect, which is characterized in that institute
Stating the hardness tester in step S1 further includes diamond penetrator and load force measuring instrument, and the diamond penetrator is in different load forces
The indentation of depth is corresponded in preform surface etch.
3. the method for quantitative measurment according to claim 2 and evaluation preform polishing effect, which is characterized in that institute
Stating the diamond penetrator end in step S1 is rectangular pyramid, spherical shape or cone.
4. the method for quantitative measurment according to claim 3 and evaluation preform polishing effect, which is characterized in that
The acquisition step of formula (1) in the step S1 are as follows: first using diamond penetrator of different shapes respectively to preform
Multiple etching is carried out, while corresponding load force F is etched by the determination of load force measuring instrument every time, in conjunction with indenter shape and indentation
Size obtains the numerical value of multiple width of nick h by calculating；Finally to the reality between multiple width of nick h and corresponding load force F
It tests data and carries out Function Fitting, obtain formula (1)Wherein pressure head correspondence of different shapes obtains
The constant k and μ value obtained in formula (1) is different.
5. the quantitative method with evaluation preform polishing effect according to claim 1, which is characterized in that the S1
Hardness tester in step is rectangular pyramid or conical pressure head, obtains formula (1) in accordance with the following steps
A1, indentation: use pressure head for rectangular pyramid or cone hardness tester preform surface extrude it is multiple square or
Diamond shape or circular score line, while hardness tester records the corresponding load force F of indentation1、F2、F3、……Fn；
A2, width of nick: the catercorner length or the biggish catercorner length of diamond shape indentation of square indentation or round quarter is calculated
The diameter of trace is d, and according to pressure head geometry, it is constant that the functional relation for obtaining compression distance h and d value, which is h=λ d, λ,；
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, by different width of nick h1、h2、
h3……hnWhen corresponding loading force F1、F2、F3、……FnIt is included in table；
A4, obtain formula (1): by the list data of multiple and different width of nick h and corresponding loading force F in the step A3 into
Line function fitting, obtains the functional relation formula (1) of hardness tester loading force F and width of nick hWherein k is normal
Number, i.e.,Wherein k is constant and μ=0.
6. the quantitative method with evaluation preform polishing effect according to claim 1, which is characterized in that the S1
Hardness tester in step is the spherical indenter that radius is r, obtains formula (1) in accordance with the following steps
A1, indentation: multiple circular score lines, while hardness are extruded on preform surface using the spherical indenter of Rockwell hardness instrument
Instrument records the corresponding load force F of indentation1、F2、F3、……Fn；
A2, calculate width of nick: the diameter of circular score line show that compression distance h and indentation are straight according to pressure head geometry for d
The functional relation of diameter d is
A3, fitting data is obtained: under the premise of preform surrounding layer hardness is uniform, by different width of nick h and its institute
Corresponding loading force F is included in table；
A4, formula (1) is obtained: by multiple and different width of nick h in the step A31、h2、h3……hnWith corresponding loading force
F1、F2、F3、……FnList data carry out Function Fitting, obtain loading force F and width of nick h functional relation formula
(1)Wherein k and μ is constant.
7. the method for quantitative measurment according to claim 1 and evaluation preform polishing effect, which is characterized in that institute
Hardness tester is stated equipped with camera, the pressure head indentation trace on preform is found and recorded to camera in the step S3.
8. the method for -7 any quantitative measurments and evaluation preform polishing effect according to claim 1, feature
Be, the quantitative measurment and evaluation preform polishing effect method be suitable for fuel gas, organic solvent cleaning or
Acid solution forms of corrosion is processed by shot blasting preform outer surface.
9. the method for quantitative measurment according to claim 1 and evaluation preform polishing effect, which is characterized in that institute
It states further comprising the steps of after step S4:
S5, adjusting parameter: according to the comparing result of the step S4, one or more of burnishing parameters of polissoir are adjusted
Afterwards, it using unpolished preform, is processed by shot blasting and measures according to operating procedure of the step S1 into S4, make
The practical polishing depth h of preformxMore than or equal to target polished depth h0Namely hx≥h0, while improving polishing effect
Rate reduces energy consumption cost, completes the adjustment of burnishing parameters.
10. the method for quantitative measurment according to claim 1 and evaluation preform polishing effect, feature exist
In formula (1) in the step S1For different optical fiber prefabricating stick cladding hardness,
Corresponding k with μ value is different.
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