CN108829920A - A kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature - Google Patents
A kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature Download PDFInfo
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- 238000005219 brazing Methods 0.000 title claims abstract description 51
- 230000006698 induction Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011156 evaluation Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002356 single layer Substances 0.000 claims abstract description 11
- 238000005476 soldering Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000009713 electroplating Methods 0.000 claims abstract description 6
- 238000005299 abrasion Methods 0.000 claims abstract description 5
- 238000012937 correction Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229910017945 Cu—Ti Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
Present invention relates particularly to a kind of assessment model and methods of super-abrasive grinding wheel induction brazing temperature；The technical issues of solution is：A kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature that can obtain brazing temperature range is provided；The technical solution used for：A kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature, includes the following steps：In equally spaced several temperature (T0……Tn) under using induction brazing method prepare multiple groups single layer soldering super-abrasive grinding wheel sample；Wear test is carried out under the conditions of constant grinding dosage to every group of grinding wheel sample until failure；Total amount Q is removed by the workpiece material that grinding parameter and grinding stroke calculate every group of grinding wheelT；With electroplating abrasion wheel as reference group, obtain its evaluation index f (Ep), by choosing adjusted coefficient K appropriate (between 1.3~2), with F (T) >=K f (Ep) as the evaluation function of induction brazing temperature T, obtain meeting the induction brazing temperature range that grinding requires；The present invention is suitable for soldering field.
Description
Technical field
The invention belongs to the technical fields of super-abrasive grinding wheel, and in particular to a kind of super-abrasive grinding wheel induction brazing temperature
Assessment model and method.
Background technique
Recent decades studies have shown that single layer soldering super-abrasive grinding wheel can be realized between bonding agent (solder) and abrasive grain
Chemical bonding, abrasive material hold intensity, processing efficiency, in terms of there are advantages, it is considered to be current galvanizer
The regeneration product of tool has broad application prospects in difficult-to-machine material high efficient grinding field.
Induction brazing can control the deformation of grinding wheel base body in a manner of local heating, improve brazed abrasive wheel itself precision
Aspect has a clear superiority.So far, domestic and foreign scholars have carried out relatively broad research with regard to super hard abrasive induction brazing,
Such as Chattopadhyay A K etc., Ma Baijiang etc. successively prepare monolayer superabrasive grinding wheel using induction brazing, in test
Show preferable grinding performance.In these researchs, generally soldering molten bath is handled as uniform temperature field, and only visits
The brazing quality under the conditions of several temperature values is begged for.However, the influence factor of induction heating temperature is more, mechanism of action ratio
It is more complex, cause the temperature field under the conditions of induction brazing in molten bath to be difficult to realize absolute uniform, is heated in particular for forming surface
When, it is influenced by sharp angle effect and edge effect, type face is more obvious along the non-uniform temperature phenomenon of contour direction.
Summary of the invention
The present invention overcomes the shortcomings of the prior art, and technical problem to be solved is：Pricker can be obtained by providing one kind
Weld the assessment model and method of the super-abrasive grinding wheel induction brazing temperature of temperature range.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of super-abrasive grinding wheel induction brazing
The assessment model and method of temperature, includes the following steps：
S101, in equally spaced several temperature (T0……Tn) under using induction brazing method prepare multiple groups single layer soldering
Super-abrasive grinding wheel sample；
S102, wear test is carried out under the conditions of constant grinding dosage to every group of grinding wheel sample until failure；
S103, the workpiece material that every group of grinding wheel is calculated by grinding parameter and grinding stroke remove total amount QT：
QT=ap·len·w·P (1)
In formula：apFor cutting-in, len is Workpiece length, and w is the width of the workpiece, and P is the head office's number of passes being ground when grinding wheel fails；
S104, induction brazing temperature evaluation overall target model be：
F (T)=KF/FT+KQ·QT (2)
In formula：F (T) is temperature evaluation index, KF、KQRespectively initial normal grinding force FTAnd workpiece material removal is total
Measure QTWeight correction factor evaluation index cubic spline interpolation at each temperature is obtained into function F (T).
S105, with electroplating abrasion wheel as reference group, obtain its evaluation index f (Ep), pass through and choose adjusted coefficient K appropriate
(between 1.3~2) obtain meeting the induction that grinding requires with F (T) >=Kf (Ep) as the evaluation function of induction brazing temperature T
Brazing temperature section.
Preferably, in step S102, the definition criterion of the failure is：According to the grinding force of real-time measurement, grinding is calculated
Grinding force ratio F in the processn/Ft, i.e. the ratio between the normal force Yu tangential force of workpiece, when power is than being gradually increased to the 2.5 of starting force ratio
Times when, that is, reach failure criteria.
Preferably, the KFValue range be 2000~8000.
Preferably, the KQValue range be 0.2~0.8.
The present invention has the advantages that compared with prior art：
A kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature provided by the invention can be provided quantitatively
The bath temperature range of induction brazing, to guarantee that strength of joint and grinding performance meet requirement；The model is to be brazed
Temperature is as independent variable, the performance of two aspects of sharpness and wheel life of overall merit grinding wheel, to obtain satisfaction grinding
The brazing temperature range of performance requirement prepares multiple groups single layer soldering super hard abrasive using induction brazing under the conditions of series of temperature
Grinding wheel, the grinding force and material obtained by grinding test remove total amount to characterize grinding wheel sharpness and wheel life respectively, most
Afterwards as a control group with single layer plating super-abrasive grinding wheel, the molten bath temperature of induction brazing is quantitatively provided by the evaluation function of foundation
Range is spent, to guarantee that strength of joint and grinding performance meet requirement, to optimize super-abrasive grinding wheel induction brazing temperature
Degree control provides Appreciation gist.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing；
Fig. 1 is the structural schematic diagram of grinding test device of the present invention；
Fig. 2 is the experimental data figure in the embodiment of the present invention two；
Wherein：1 is fixture, and 2 be titanium alloy workpiece, and 3 be grinding wheel, and 4 be CBN abrasive grain.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments；Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment one：
A kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature, includes the following steps：
S101, in equally spaced several temperature (T0……Tn) under using induction brazing method prepare multiple groups single layer soldering
Super-abrasive grinding wheel sample；
S102, wear test is carried out under the conditions of constant grinding dosage to every group of grinding wheel sample until failure；The failure
Definition criterion be：According to the grinding force of real-time measurement, the grinding force ratio F in grinding process is calculatedn/Ft, i.e. the normal direction of workpiece
The ratio between power and tangential force reach failure criteria when power is than being gradually increased to 2.5 times of starting force ratio；
S103, the workpiece material that every group of grinding wheel is calculated by grinding parameter and grinding stroke remove total amount QT：
QT=ap·len·w·P (1)
In formula：apFor cutting-in, len is Workpiece length, and w is the width of the workpiece, and P is the head office's number of passes being ground when grinding wheel fails；
S104, induction brazing temperature evaluation overall target model be：
F (T)=KF/FT+KQ·QT (2)
In formula：F (T) is temperature evaluation index, KF、KQRespectively initial normal grinding force FTAnd workpiece material removal is total
Measure QTWeight correction factor, evaluation function f(T)Value is bigger, indicates that the soldering CBN wheel grinding performance under the conditions of the temperature is got over
It is good, evaluation index cubic spline interpolation at each temperature obtains function F (T), the KFValue range be 2000~
8000, the KQValue range be 0.2~0.8.
S105, with electroplating abrasion wheel as reference group, obtain its evaluation index f (Ep), pass through and choose adjusted coefficient K appropriate
(between 1.3~2), with F (T) >=K f (Ep) as the evaluation function of induction brazing temperature T, to obtain meeting grinding requirement
Induction brazing temperature range, adjusted coefficient K is bigger, and the induction brazing temperature range of acquisition is smaller.
Embodiment two：
Fig. 1 is a kind of grinding examination of assessment model and method of super-abrasive grinding wheel induction brazing temperature provided by the invention
The structural schematic diagram of experiment device, fixture 1 are arranged on titanium alloy workpiece 2, and in the present embodiment, abrasive material selects granularity for 80/100
Mesh, 150 μm~180 μm of diameter of CBN abrasive grain 4 and Ag-Cu-Ti solder alloy, main component are 96 (72Ag-28Cu) -4Ti
(wt.%), single layer soldering CBN grinding wheel 3,3 diameter 6mm of grinding wheel, in test, using infrared thermal imagery are made using high-frequency induction brazing
Instrument thermometric controls brazing temperature between 880 DEG C~1000 DEG C, is brazed 7 groups of samples altogether at interval of 20 DEG C.
The TC4 titanium alloy grinding test under the conditions of constant grinding dosage, titanium alloy ruler are carried out to above-mentioned each group brazed coupon
Very little 50mm × 5mm × 100mm, grinding parameter are：Grinding speed 6m/s, cutting-in 0.01mm, feed speed 600mm/min；This
Outside also using electroplating CBN grinding wheel as control group, normal grinding force F of each group sample in the case where stablizing grinding status is obtainedT, when each
When group grinding wheel failure, workpiece material removing amount Q is calculatedT, the results are shown in Table 1.
The normal grinding force of 1 each group sample grinding test of table
Take KF=4000, KQ=0.5, according to formula f (T)=KF/FT+KQ·QTCalculate the evaluation of estimate f of each group brazed abrasive wheel
(T), using brazing temperature T as independent variable, evaluation function f (T) is dependent variable, carries out cubic spline interpolation to the data obtained, can obtain
To curve as shown in Fig. 2, in Fig. 2 black data point brazed abrasive wheel evaluation of estimate f (T), curve be data interpolating function F (T).
According to table 1, the evaluation index f (Ep)=4182.692 of electroplating abrasion wheel can be calculated, K=1.3 is taken, then has：
F(T)≥K f(Ep)
Solution obtains：
927℃≤T≤961℃
I.e. (927 DEG C, 961 DEG C) of temperature range are brazing temperature range.
A kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature provided by the invention can be provided quantitatively
The bath temperature range of induction brazing, to guarantee that strength of joint and grinding performance meet requirement；The model is to be brazed
Temperature is as independent variable, the performance of two aspects of sharpness and wheel life of overall merit grinding wheel, to obtain satisfaction grinding
The brazing temperature range of performance requirement prepares multiple groups single layer soldering super hard abrasive using induction brazing under the conditions of series of temperature
Grinding wheel, the grinding force and material obtained by grinding test remove total amount to characterize grinding wheel sharpness and wheel life respectively, most
Afterwards as a control group with single layer plating super-abrasive grinding wheel, the molten bath temperature of induction brazing is quantitatively provided by the evaluation function of foundation
Range is spent, to guarantee that strength of joint and grinding performance meet requirement, to optimize super-abrasive grinding wheel induction brazing temperature
Degree control provides Appreciation gist.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that：Its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (4)
1. a kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature, it is characterised in that：Include the following steps：
S101, in equally spaced several temperature (T0……Tn) under using induction brazing method preparation multiple groups single layer soldering it is superhard
Abrasive grinding wheel sample；
S102, wear test is carried out under the conditions of constant grinding dosage to every group of grinding wheel sample until failure；
S103, the workpiece material that every group of grinding wheel is calculated by grinding parameter and grinding stroke remove total amount QT：
QT=ap·len·w·P (1)
In formula：apFor cutting-in, len is Workpiece length, and w is the width of the workpiece, and P is the head office's number of passes being ground when grinding wheel fails；
S104, induction brazing temperature evaluation overall target model be：
F (T)=KF/FT+KQ·QT (2)
In formula：F (T) is temperature evaluation index, KF、KQRespectively initial normal grinding force FTAnd workpiece material removes total amount QT's
Evaluation index cubic spline interpolation at each temperature is obtained function F (T) by weight correction factor.
S105, with electroplating abrasion wheel as reference group, obtain its evaluation index f (Ep), pass through and choose adjusted coefficient K (1.3 appropriate
Between~2), with F (T) >=K f (Ep) as the evaluation function of induction brazing temperature T, obtain meeting the induction pricker that grinding requires
Weld temperature range.
2. a kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature according to claim 1, feature
It is：In step S102, the definition criterion of the failure is：According to the grinding force of real-time measurement, the mill in grinding process is calculated
Cut power ratio Fn/Ft, i.e. the ratio between the normal force Yu tangential force of workpiece reach when power is than being gradually increased to 2.5 times of starting force ratio
To failure criteria.
3. a kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature according to claim 1, feature
It is：The KFValue range be 2000~8000.
4. a kind of assessment model and method of super-abrasive grinding wheel induction brazing temperature according to claim 1, feature
It is：The KQValue range be 0.2~0.8.
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