Honing of project pottery and porcelain machines exterior quality

11 　 TH161.

Material of pottery and porcelain of 1 　 project because its good mechanical performance has wide applied perspective in the project. Aperture kind spare parts of pottery and porcelain is applying at a lot of industry domains, use cylinder body of pottery and porcelain without engine of cooling system pottery and porcelain, can improve fuel utilization rate and travel efficiency, reduce oily cost. Oil drills equipment in, use ZTM(zirconia to add Mo Laishi of pliable but strong) the slop pump cylinder bushing that material of pottery and porcelain makes, its life is the 3 times above of hard alloy cylinder bushing, raised the working life of slop pump and dependability substantially. In addition, bearing of pottery and porcelain is covered and spin is covered with force plunger of pottery and porcelain wait to all get applied in industry. Honing is commonly used at inside the finish machining of aperture surface, it is method of a kind of efficient treatment at the same time, but purify is bigger surplus, suit to machine the nicety with opposite motion tall precision occasionally. Wait for the application that exceeds hard abrasive as diamond, henceforth, to the honing of material of high-powered pottery and porcelain treatment will have very large proportion [1] . Honing treatment is air cylinder of engine of pottery and porcelain (Mg-PSZ, cylinder body of pump of silt of TZP) , pottery and porcelain (ZTM, al2O3) and bearing of pottery and porcelain are covered (HPSN, the aperture such as RBSN) kind the optimal choice of spare parts machining. One of main research tasks that honing of material of project pottery and porcelain faces are how to improve treatment quality, develop the exceedingly good property of material. The article provided two respects to study the honing surface quality of material of project pottery and porcelain from material of pottery and porcelain and top gem grinding work, analyse honing surface surface roughness and exterior wear-resisting performance, main test condition is as follows: Machine tool: Diameter of test specimen of M4215 vertical honing machine: Speed of 65 Mm honing: 12.

Speed of move back and forth of oilstone of 44 M/min 　 : 4.

Actuating pressure of oilstone of 8 M/min 　 : 0.

24MPa 　 oilstone exceeds Cheng amount: Time of honing of 20 Mm 　 : Cooling condition of 3 Min 　 : Kerosene + engine oil grinder: MG1432A high accuracy is all-purpose rotate speed of main shaft of cylindrical grinder workpiece: Speed of grinding wheel spindle of 140 R/min 　 : Model of emery wheel of 　 of 10 000 R/min: 　 of 10 × 3RVD 140/170 B 100 checks 10 × of 1A1/T2 30 × instrument: Taylor-Hobson-6 surface surface roughness appearance, surface roughness of surface of UBM small focal length quality of surface of treatment of honing of material of 1 different pottery and porcelain analyses appearance the sort of material of pottery and porcelain is different, its grinding machines exterior surface roughness to be worth existence difference, the grinding processability that surface roughness was worth surface of material of the pottery and porcelain after treatment to reflect data on certain level [2] . The honing treatment of material of pottery and porcelain has similar pattern. Below same test condition, honing processes data of 4 kinds of pottery and porcelain: 95Al2O3, ZTM, ZTM/SiCp and HPSN. Among them, oilstone model is SFH 72 × 6 × of 6 × 2 RVD 230/270 B 75. Experimental result sees a picture 1. Graph Ra of surface of material of 1 pottery and porcelain is worth a few kinds of afore-mentioned material in, the intensity lowest of 95Al2O3 material, brittleness is the biggest, machine easily, material with brittleness means purify, collapse of brittleness of treatment surface existence divides the indentation that stay. Add material oneself porosity taller, the exterior surface roughness after be being machined so is worth the biggest. The Ra value of 95Al2O3 is 0.

M of 85 μ , far outclass other material of a few kinds of pottery and porcelain. Material of ZTM pottery and porcelain, because zirconia particle is joined in Mo Laishi matrix, suffer stress revulsive photograph changes the effect that adds mechanism of pliable but strong and micro-crack to add mechanism of pliable but strong, its intensity and tenacity got rising, can obtain smaller than 95Al2O3 surface surface roughness to be worth. Material of ZTM/SiCp pottery and porcelain, on the foundation of ZTM, add photograph of SiC grain dispersion, have the Jiang Ren that gives priority to with crackle deflexion to change the mechanism that add pliable but strong, make grain fills the intensity of material of strong ZTM/SiCp pottery and porcelain and tenacity rise further, in same treatment the condition falls, material brittleness ruptures the probability of purify is reduced, the density that increases ceramic of hot pressing agglomeration is high, accordingly, the surface roughness of honing treatment surface of material of ZTM/SiCp pottery and porcelain is worth inferior, be close to basically with material of HPSN pottery and porcelain on numerical value. Visible, when honing of material of choice project pottery and porcelain machines craft parameter, still should consider the impact of qualitative element of material of the workpiece that be added. The influencing factor of the quality of surface of treatment of honing of material of influence project pottery and porcelain that grinding work of 2 top gems has surface roughness of pair of surface of honing of pottery and porcelain can divide it is two kinds: Honing craft parameter and top gem grinding work provide parameter. Among them, the effect of tool parameter is most distinct. The article is with material of ZTM pottery and porcelain exemple, basically inspect diamond oilstone granuality, chroma and bond 3 tools parameter is right the influence rule of surface roughness of surface of treatment of honing of project pottery and porcelain. 2.

Surface roughness of surface of material of the pottery and porcelain after spending pair of honing has bead of oilstone of diamond of granuality of 1 diamond oilstone main effect. Choose the oilstone abrasive of 3 kinds of granuality, undertake to material of ZTM pottery and porcelain honing is machined, among them, chroma of colophony bond oilstone is 50% , the result sees a picture 2 medium granuality contrast parts. As granuality of diamond oilstone abrasive reduce, the treatment surface quality of material of pottery and porcelain gets clear improvement. The granuality of oilstone abrasive pursues value of Ra of surface of material of pottery and porcelain of 2 　 ZTM is fine, the interaction area scope that wears bead and stuff of pottery and porcelain is little, the cutting ability that wears bead is weak, material purify quantity is little, the grinding trace that produces in surface of material of pottery and porcelain is shallow. Then, value of Ra of surface roughness parameter is inferior. When finish machining of material of project pottery and porcelain, the manson of King Kong oil that should choose fine granuality is provided, avoid the generation of nick, in order to acquire eligible exterior quality. 2.

Chroma of 2 diamond oilstone chooses abrasive of oilstone of diamond of 3 kinds of pH indicator, undertake to material of ZTM pottery and porcelain honing is machined, among them, granuality of colophony bond oilstone is 230/270, the result sees a picture 2 medium chroma contrast parts. The density of diamond oilstone is low, the number wearing bead on area of oilstone surface unit decreases, bring about the inhomogenous sex that surface of honing of material of pottery and porcelain machines. And, individual the active force that grinds bead to go up is large, material of pottery and porcelain destroys formal purify more easily with brittleness, treatment surface leaves deeper nick. Accordingly, the Ra of surface of material of pottery and porcelain of honing of low density oilstone wants a few taller. From the graph 2 can see, diamond oilstone chroma machines the influence of exterior surface roughness to honing of material of pottery and porcelain, do not resemble oilstone granuality remarkable in that way. It is the quality of surface of honing of project pottery and porcelain with be obtained better, the chroma of diamond oilstone is unfavorable choose too lowly. 2.

Spare parts of pottery and porcelain of project of bond of 3 diamond oilstone is machined actually in, use goods of tool of colophony bond diamond to regard cutting as the tool commonly, be compared to obtain taller grinding and machine efficiency, choose tool of metallic bond diamond normally. Choose 230/270 of oilstone abrasive granuality, chroma is 75% . From the graph 2 medium bond contrast can see partly, the surface roughness of surface of pottery and porcelain after oilstone of diamond of colophony, bronze, cast-iron bond is machined is worth a difference not quite. And the surface roughness of surface of material of pottery and porcelain after honing of plating diamond oilstone is worth report to lift quickly, the biggest to the influence of quality of surface of material of pottery and porcelain. Eletroplate oilstone surface grinds bead to be exposed adequately, in surface of material of pottery and porcelain treatment gives profound nick. The nicety that quality of flat-roofed honing surface analyses material of 3 pottery and porcelain to cooperate precision to ask to having occasionally, its machine exterior quality finally, in use appears more important. It is in the application such as cylinder body of engine of car, autocycle with material of pottery and porcelain exemple, if material surface quality is poor, can produce the surface to wear away phenomenon (3) seeing a picture: The protruding peak with sharp outline of surface of material of pottery and porcelain or the metallic component that cutting cooperates to it or exterior outline aiguille is bumped each other between material of pottery and porcelain, bring about a component finally to cooperate dimension to exceed tolerancepublic errand range, cooperate precision to drop, add fuel thereby use up. Graph 3 those who coordinate a side wear away flat-roofed honing passes pottery and porcelain He Jinghang of thick top gem two working procedure, the oilstone of colophony bond diamond that uses granuality 140/170 first namely undertakes thick top gem, form reticulation; The top gem of SiC oilstone essence of reoccupy granuality 270/325, the pointed coping of peak of protruding of reticulation of surface of take out rough machining is divided. Flat-roofed honing machines a method, not only but the sharp protruding in outline of surface of material of purify project pottery and porcelain sharp edge, avoid to produce a picture of 3 wear away phenomenon, and the bearing acreage that increases treatment aperture surface, shorten of aperture surface " run close " period, lengthen " stable " wear away period, increase a spare parts to machine exterior wearability further. Grinding of course of material of Mg-PSZ pottery and porcelain and the exterior outline that flat-roofed honing machines (4) seeing a picture. Contrast machines material surface outline of the method two kinds, can see apparently, peak of outline of surface of material of the pottery and porcelain after grinding is machined, cereal distributings random, the surface is put in a lot of raised aiguille, unwell and operable do nicety to cooperate the surface. The SiC oilstone in flat-roofed honing is small to the cutting action of material of pottery and porcelain, only can part of aiguille of outline of surface of material of purify pottery and porcelain, obtain flat surface outline. Graph outline of surface of material of 4 　 Mg-PSZ (A) grinding surface (surface of material of surface of B) flat-roofed honing fights abrasive to wear away ability and material surface outline are microcosmic and rough the outline bearing length that spends appearance character to concern leads a curve (Tp curve) have affinity with amplitude distribution curve, the wear-resisting function of surface of material of specification of two curves figure [3, 4] . If material surface outline is very even, criterion Tp curve appearance is evener, range of amplitude distribution of exterior outline height is narrow, this explains the wearability of material surface is good. Conversely, if material surface is put in a lot of raised aiguille, criterion Tp curve appearance is steeper, range of amplitude distribution of exterior outline height is wide, material surface wearability is bad. Consider to make clear, the form of exterior Tp curve that grinding processes is steeper, the distributinging range of curve of extent of exterior outline height is wider. The wear-resisting performance of material surface is poorer. And the material surface that machines through flat-roofed honing, tp curve appearance is evener, distributinging range of curve of extent of exterior outline height is narrow, material surface has good wear-resisting performance. Afore-mentioned research proved material of project pottery and porcelain machines the existence with flat-roofed and characteristic surface as a result, aborning can choose sound treatment technology, from machining angle, improve the mechanical performance of material of pottery and porcelain. 4 conclusion 　 (sort of material of 1) pottery and porcelain is different, its honing machines exterior surface roughness to be worth the difference with constant presence. Lower, brittleness jumps over the intensity of material of pottery and porcelain tall, its machine exterior surface roughness the value is greater. The honing of material of pottery and porcelain machines the influencing factor that returns material of Lv of take an examination. (Grinding work of 3 top gems has granuality of 2) diamond oilstone, chroma and bond in parameter, the effect effect that oilstone granuality and oilstone bond machine exterior surface roughness to honing of material of pottery and porcelain is more distinct. (Material of 3) project pottery and porcelain uses flat-roofed honing to machine a method, but the sharp protruding peak in outline of purify material surface, form the face of material of pottery and porcelain that has flat-roofed character, avoid to produce those who cooperate face material to wear away in applying actually. CNC Milling