Exceed numerical value of metabolic of accurate and planar abrade millstones to emulate research
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2 KPa, 13.
2 KPa, 21.
8kPa and LlkPa. This value can be designed for muller choose with the reference when using. Keyword: Exceed nicety abrade; Abrade dish; Numerical value is emulated; Be out of shape Numerical Simulation Of Lapping Platede Formation In Ultra-precision Flat Lapping TaoYuzhi WangChengyong YuanHui SongYuexian (Faculty Of Mechanical And Electronic Engineering, guangdong University Of Technology, guangzhou 510090, china) Abstract: Relationship Between The Maximum Plate Deformation And The Load Conditions Were Simulated Using ANSYS10.
0 Software On Lapping Plates Made Of Mono-material(Fe, sn, PTFE)and Binary Materials(Fe-Sn, fe-PTFE) . Based On The Analysis And Calculation, conclusions Are Obtained As Follows: The Bigger The Material ' S Young ' S Modulus, the Smaller The Defomration Of The Lapping Plate; The Plate Defomration Is Much Smaller When The Plate Is Made Of Hard Base Material And Soft Top Material Than The Case When The Plate Is Made Of The Same Soft Material; H 40mm And Made Of Fe of × of For Lapping Plates Of D 400mm, sn, fe-Sn, fe-PTFEre Spectively, the Effective Maximum Load Pressuresare 31.
2 KPa, 13.
2kPa, 21.
M of μ of 8 KPa And 11k Pare Spectively When The Maximum Defomration Of The Plates Is 2. These Data Arevery Useful As References For The Design Of A Lapping Machine. Keywords: Lapping; Lapping Plate; Simulation; Defomration preface regards a kind of commonly used superprecision as the method, exceed accurate and planar abrade processing technique to be used to obtain extremely high spare parts area precision (wait like flatness, parallelism) and eliminate treatment metamorphism layer [1-5] . Super- accurate plane is abrade include to grind normally millstones, abrade fluid, grind 4 parts such as bead, workpiece, in abrade treatment, grind the exterior form appearance of millstones can be on certain level " duplicate " to workpiece apparently, in the meantime, its face precision is right quality of the workpiece that be added has main effect. It is the abrade effect with be obtained better, domestic and international a lot of scholars are the choice of millstones material, abrade to grinding dish of structural design and grind the research that the respect such as the nap of millstones surface made deep person. In abrade treatment, must pass online nap, will maintain grind the flatness of millstones. Can carry correction ring rotate to be amended continuously in real time grind the flatness of millstones [6] , the means that perhaps uses turning nap to grinding millstones undertakes nap [7-8] . Wear dish of stuff to grinding and character, ask its have taller hardness already, prevent to bear of the oneself when to load pressure had been out of shape big, in the meantime, ask again its can the scratch that guarantee against is held the post of why to come from millstones or nick, have taller abrade efficiency, so, grind millstones must have again good " embed arenaceous " ability. Integrated these two kinds of requirements, grind millstones material chooses cast-iron He Chunxi commonly [2, 7] . The abrade effect of different abrasive and different material millstones is different, should seek correspondence to reach millstones at the optimal abrasive of different workpiece [9-10] . In relevant document [7, 11] soft polish is used to solve in the report dish had been out of shape big question, investigator people used it is matrix with horniness material, will get together 4 fluorine ethylene (PTFE) wait for joint of weak qualitative data to act as in horniness material surface the method that polishing mat has polishing, can acquire the polishing property with weak qualitative favorable data namely so, can utilize the tall rigidity of base material again, avoided polishing mat to be out of shape because of getting force, be affected by the heat, obtained favorable polishing result thereby. Grind millstones serves as the carrier that surpasses accurate and abrade workpiece, the intensity of pressure between it and workpiece distributings the quality that affecting treatment part [12] . But bear in workpiece when to load pressure, grind those who grind dish of matrix itself is specific be out of shape circumstance how, had not seen relevant document has a story. Below good case, grind of millstones on the surface is in horizontal condition. In be being machined actually, abrade purify should come true in pressure of the to load on abrade workpiece when, grind millstones can happen necessarily be out of shape. If millstones has been out of shape big, the pressure that can make work place suffers and grinding force are inhomogenous, make the spare parts of crisp fritter sex such as crystal, pottery and porcelain produces damaged to perhaps be out of shape easily, the influence machines precision [4] . This is out of shape direct design, as abrade as muller closely related dish of material choice and abrade treatment craft. Accordingly, what mathematical calculation gives different data is abrade dish of the biggest deflection below pressure of different to load and to load radius, correct to choosing grind millstones, control grinds the face of millstones precision and the scale that raise workpiece precision is very important. The article needs to be a foundation with actual muller design, use finite yuan of software, emulation analysis by cast-iron, stannum, get together 3 kinds of material such as 4 fluorine ethylene are combined grind when millstones, grind the impact that model of flexibility of radius of the biggest deflection of millstones and to load pressure, to load, material measures, the good and abrade performance that offerred the tall tigidity that uses base material and weak qualitative data has a few principles of treatment. 1 grind emulation method of millstones metabolic statics is in actual treatment process (the L) that be like a graph, grind the turn that millstones makes angular velocity be ω together along with main shaft moves. But to the machine tool character, the pressure head position that outputs to load pressure is changeless, this is meant when R of to load radius and P of to load force are changeless, grind the biggest deflection of millstones is changeless from beginning to end. At grinding through analysing knowable the biggest deflection to arise the edge of the surface on millstones is in. Because rotate speed ω is not affected,grind the biggest deflection of millstones, because this will grind of millstones the biggest be out of shape the problem regards as statics is out of shape the issue will handle. Graph sketch map of motion of 1 planar muller is in actual design, design of pressure head diameter is workpiece diameter very one of. Main shaft is become by 45 steeliness, design length 250 Mm, point of action of the main shaft bearing that prop up and grind the vertical distance of the surface below millstones is 50 Mm. Reason builds a model in entity when, it is the height of main shaft 50 Mm surely, 100 Mm of main shaft diameter. Grind millstones diameter grinds to be 400 Mm when millstones is made by single material, thick 40 Mm, if pursue,2a place is shown. When emulate ordinal change is its material cast-iron, pure stannum and PTFE. Grind when millstones is made by double deck material, its model is like graph 2b place show, grind right now millstones diameter is 400 Mm. Among them, upper levels is weak simple stuff thick 15 Mm, when emulating ordinal use stannum, PTFE; Lower level is cast-iron material thick 25 Mm. Should grind when millstones is combined for double deck material, because go up,below two material tighten solid link with a certain number of bolt, reason builds a model in entity when with Glue Boer operation tries these two material stickup, in order to achieve both a metabolic emulates the effect. If the performance data of each material expresses 1 to show. Use ANSYS10.
0 medium three-dimensional and hypostatic unit Solid45 undertake reseau differentiates, if pursue,2 are shown. Watch 1 grind millstones and density of name of material of parameter of main shaft material / (103kg/m3) Poisson of GPa of ／ of stretch model quantity compares casting pig 7.
8 120 0.
3 pure stannum 7.
29 44.
3 0.
29 get together 4 fluorine ethylene 2.
2 0.
7 0.
4 45 steel 7.
9 207 0.
29 graphs 2 abrade dish of hypostatic model and reseau model sketch map will be finite the tie of underside of yuan of the main shaft in the model is set for total obligation, underside of limitative main shaft all displacement. Part the R=60 Mm on ongoing millstones, 90mm, 120 Mm and 150 Mm place, the pressure of to load P=6 KPa, 8 KPa, 10 KPa, 12 KPa. After be being installed through seeking solution, undertake emulation an analysis. The other a side of pressure is met upsweep, be down bent displacement the quantity is far the displacement quantity that is more than upsweep. The biggest displacement produces ongoing millstones most the brim place of right. What Nextpage2 emulation result and analytic graph 3a, 3b shows is R=90 Mm of to load radius respectively, p=10 KPa of to load pressure, grind millstones material is what pure stannum reachs the millstones when iron combines pure Xi Yizhu to be out of shape respectively circumstance. The reseau part in the graph grinds dish of condition before not was out of shape to grind, hypostatic part controls state of the metabolic after force to bear, can see grind millstones bears a side of pressure bends downward, and did not bear the another side of pressure is met upsweep, be down bent displacement the quantity is far the displacement quantity that is more than upsweep. The biggest displacement produces ongoing millstones most the brim place of right. Graph 3 grind millstones is out of shape sketch map (R=90 Mm, p ＝ 10 KPa) graph 4 to the graph 7 those who recorded different data is abrade dish of the biggest displacement that reachs to load radius to fall in different to load pressure (namely the biggest deflection) . Should grind when millstones is made by a kind of material (the 4) that be like a graph, bring to bear on in place of R=150 Mm of radius of the biggest to load P=12 KPa of pressure of the biggest to load, grind the biggest deflection of millstones appears maximum, cast-iron dish, stannum dish, PTFE dish the biggest deflection is respectively 0.
77 forest M, 1.
82 assist M, 97.
90 forest M. Should grind when millstones is synthesized by group of two kinds of data (the 5) that be like a graph, grind the maximum that grinds dish of the biggest deflection also arises to fall in the circumstance of R2 150 Mm, P=12 KPa. Among them pure Xi Yizhu iron dish, FE one cast-iron dish of the biggest deflection it is respectively 1.
10 μ M, 2.
18 μ M. Analytic above data is knowable, use pure Xi Yizhu iron, PTFE one cast-iron form grind when the material of millstones, purer than be being used alone stannum, PTFE forms the biggest deflection of millstones grind when the material of millstones small much. Graph 4 grind its are the biggest when millstones is made by single material the relation curve of deflection and to load pressure by the graph 4 show 5 times with the graph abrade the relation curve of dish of the biggest deflection and to load pressure is knowable, should grind when millstones is made by single material or two kinds of material, in to load radius particular case falls, grind the biggest deflection of millstones and to load pressure concern into direct proportion. Set in part of the largest R=150 Mm of to load radius, the value that this change leads is K, the biggest deflection that nods each in the curve is worth for Sy, value of corresponding to load pressure is Py, change the value of rate: Formulary (1) by the graph 4 can get, should grind when millstones material is cast-iron, pure stannum or PTFE respectively, grind the value that grinds dish of the biggest deflection to follow the change of to load pressure to lead K is respectively 0.
064 μ M/kPa, 0.
152 μ M/kPa, 8.
167 μ M/kPa; By the graph 5 can get, should grind millstones material is 25 Mm respectively cast-iron - 15 Mm pure stannum, 25 Mm is cast-iron - when 15mm PTFE is comprised, the value of K is respectively 0.
092 μ M/kPa, 0.
182 μ M/kPa. The K of benefit maneuver cipher out is worth, can calculate piece will grind the cost regulation of millstones deflection is when certain limits, force of its corresponding the biggest to load should be controlled it is inside which limits. In exceeding accurate and abrade process actually, the design asks to grind millstones bears its should be controlled when load ≤ of Smax of the biggest deflection 2 μ M. By: Formulary (2) can get: Formulary (3) among them the value of P0 takes 6 KPa, the value of S0 is a graph 4, graph the R=150mm in 5 each curves, the value of the corresponding Sy when P=6 KPa. Take the place of to seek the K value that give into above paragraphs, can get ongoing millstones dimension to be diametical 400 Mm × tall 40 Mm, material is respectively cast-iron, pure stannum, cast-iron - pure stannum, cast-iron - when PTFE is combined and be being become, should make 2 μ of Smax ≤ M, pmax part of one's job is less than or be equal to 31.
2 KPa, 13.
2kPa, 21.
8kPa, LlkPa. Graph 5 grind its are the biggest when millstones is made by double deck material the relation curve Nextpage of deflection and to load pressure combines a plan 4 with the graph 5 medium curves reach a table 1 in the stretch model quantity of each material, can see, fall in same to load situation (material composition, to load radius and homogeneous phase of to load pressure are the same as) , grind the stretch model amount of millstones material is larger, its are the biggest deflection is smaller. Graph 6 with the graph of 7 abrade the relation curve of dish of the biggest deflection and to load radius makes clear, when to load pressure is constant, grind to increase and increase what the biggest deflection of millstones follows to load radius, and to load radius is bigger, grind grind dish of the biggest deflection raise rate faster. Pursue 6 grind its are the biggest when millstones is single material the relation graph of deflection and to load radius 7 grind its are the biggest when millstones is double deck material the relation curve of deflection and to load radius 3 conclusion (L) fall in same to load situation (material, to load radius, homogeneous phase of to load pressure is the same as) , grind the stretch model amount of millstones material is larger, its are the biggest deflection is smaller; In to load radius particular case falls, grind the biggest deflection of millstones and to load pressure become direct ratio; When to load pressure is constant, grind to increase and increase what the biggest deflection of millstones follows to load radius, and to load radius is bigger, grind grind dish of the biggest deflection raise rate faster; (2) be workpiece diameter when the diameter of pressure head very one of, grind millstones dimension is diametical 400 Mm × tall 40 Mm, material is respectively pure stannum, 25 Mm is cast-iron, cast-iron - 15 Mm pure stannum, 25 Mm is cast-iron - when 15 MmPTFE, should make grind millstones bears the deflection ≤ of the oneself when to load pressure 2 μ M, part of one's job of corresponding to load pressure is not ≤ 31.
2 KPa, 13.
2kPa, 21.
8 KPa and 11 KPa; (3) use horniness material to make matrix, joint of will weak qualitative data is formed together in horniness material surface grind when millstones material, abrade the deflection after is less than dish of to load to use weak qualitative data to regard as alone far grind the deflection when millstones material. CNC Milling