The cutting of project pottery and porcelain is machined (below)

The method of pottery and porcelain of what efficient cutting is there? Normal >(1) is ionic bundle add hot cutting: Material of certain pottery and porcelain can use ion bundle add hot cutting. If boracic siliceous glass reachs Molaishi (3Al2O3, 2SiO2) , should heat temperature achieves 900 K(to make an appointment with ℃ of ">630 of Value="630" UnitName=" ℃ respectively) with 1200K. (Make an appointment with ℃ of ">900 of Value="900" UnitName=" ℃ ) when, brittleness of reason of its cutting machine destroys change to be out of shape for plasticity, this is mechanism of high temperature bate. Normal >si3N4 pottery and porcelain also can be used add hot cutting. As a result of hardness of Si3N4 pottery and porcelain good, heat-resisting pounds tall, tenacity, should heat to make an appointment with ">1200 ℃ of Value="1200" UnitName=" ℃ to 1470 K() when still do not produce crackle, cut bits to be shown all the time clipper-built, exterior surface roughness is worth lesser. Normal >(2) uses CBN cutting tool to undertake cutting: CBN(cubic nitrogen changes boron) cutting tool has the hardness that is close to diamond and compressive strength, thermal stability is very tall, its hear resistance amounts to ">1500 ℃ of ℃ of Value="1500" UnitName=" of ～ of ">1400 ℃ of Value="1400" UnitName=" ℃ , the hear resistance that compares diamond (℃ of ">800 of ℃ of Value="800" UnitName=" of ～ of ℃ of ">700 of Value="700" UnitName=" ℃ ) tower above is one times closer. CBN cutting tool has inferior coefficient of friction and good thermal conductivity, and its coefficient of thermal conductivity rise and increase of temperature gradually as cutting, make point of a knife is in cutting temperature to reduce, decrease what the penknife provides to diffuse wear away, be helpful for raising treatment precision. Normal >CBN cutting tool is unwell at low speed cutting, it is in order to lose before the high temperature of the generation when horn and high speed cutting, ceaselessly inside limits of the iota in bate cutting area will be undertake cutting by cutting material. Should choose higher cutting rate commonly. When using pottery and porcelain of Si3N4 of cutting of CBN cutting tool, value="90" UnitName="m">90 M/min of ν C=60 ～ , cutting tool wears away lesser. Brittleness of CBN cutting tool is bigger, intensity and tenacity are poor, cutting what is appropriate to the occasion chooses lesser cutting deepness and feed. Normal MARGIN of pottery and porcelain of 30pt" Align=center> project: 0cm 0cm 0pt; TEXT-INDENT: 24.

1pt; LINE-HEIGHT: 30pt">8.

What does the example that uses pottery and porcelain of cutting of PCD cutting tool have? Normal > pottery and porcelain, use King Kong commonly stone mill annulus undertakes grinding, but manufacturing efficiency is low. If use PCD cutting tool to undertake cutting is machined, can improve manufacturing efficiency apparently, reduce manufacturing cost. Normal >(1) turning Al2O3: Use bit of ¢13mm circle diamond, the brand is the DA100 that Japan produces. Cutting dosage is: 60m/min of ν C=30 ～ , ap ＝ 1.

5 ～ 2mm, f=0.

05 ～ O.

12mm/r. Use wet cutting, treatment efficiency is 5 ～ 14cm³/min, it is the 3 ～ that diamond grinds round of grinding 8 times. Normal >(2) milling alumina: The density of alumina pottery and porcelain is 1.

53g/cm³ , compressive strength is 1840MPa, bending strength is 720MPa. Use DA100 round bit, cutting dosage is ν C=216m/min, ap ＝ 0.

5mm, feed is F=0.

05 ～ 0.

12mm/z, cutting 48min, cutting tool wears away only 0.

1mm left and right sides. Normal >(3) turning nitrogen changes silicon pottery and porcelain: Nitrogen changes density of silicon pottery and porcelain for 3.

15g/cm³ , hardness is HV900 ～ 1000, bending strength is 400MPa. Use ¢13mm round bit, 80m/min of ν C=50 ～ , 1 ～ of Ap ＝ 2mm, f=0.

05 ～ 0.

2mm/r. Treatment efficiency is 10 ～ 32cm³/min, it is the 3 ～ that diamond grinds round of grinding 10 times. Normal MARGIN of pottery and porcelain of 30pt" Align=center> project: 0cm 0cm 0pt; TEXT-INDENT: 24.

1pt; LINE-HEIGHT: 30pt">9.

What grinding characteristic does project pottery and porcelain have? Normal > considered to obtain very great progress to what cutting of material of project pottery and porcelain machines, but be apart from completely practical change still differ very far. Current, the machining of project pottery and porcelain still uses traditional treatment method generally, grind with diamond namely round of grinding, abrade with polishing. Grinding occupies the 20 ％ of gross of machining of project pottery and porcelain, and cutting treatment is occupied only 10.

4 ％ . The grinding of project pottery and porcelain has the following characteristic: Normal >(1) is ground annulus wear away big, grinding comparing is small: The purify mechanism of project pottery and porcelain is brittleness is destroyed, differ with grinding metal. Metallic stuff is to rely on plasticity to be out of shape generate cut bits continuously and of purify, and project pottery and porcelain is to rely on brittleness chap to destroy generation imperceptible and pulverous shape cuts bits and of purify. Pulverous shape cuts bits to wear away very easily grind round of bond that go up, cause diamond grain to fall off. Be jumped over by the fracture toughness of material of pottery and porcelain of grinding big, add grind annulus power is greater, grind annulus wear away more serious also. Visible, the stuff of pottery and porcelain with old fracture toughness, grinding comparing is small, grinding efficiency is low. To raise the working dependability of spare parts of machinery of pottery and porcelain, must improve the performance of material of pottery and porcelain, include to raise the fracture toughness of material of pottery and porcelain among them. And of fracture toughness rise, make grinding more difficult necessarily. Normal >(2) grinding muscularity, grinding efficiency is low: Material of pottery and porcelain is when grinding, tangential the ratio of grinding force FC and FP of radial grinding force, when comparing grinding steel (FC/FP ＝ 0.

3 ～ 0.

5) is small much, general FC/FP ＜ 0.

1. When material of grinding pottery and porcelain, FP of radial grinding force is big, action the power that goes up at grinding axle is great, axial flexibility is out of shape also increase subsequently, produce vibration easily and affect treatment surface quality, reduce grinding efficiency. Normal >(3) grinding reduces: The intensity of spare parts of pottery and porcelain differs as grinding condition and change. The factor that affects intensity change includes to grind action of round of granuality, load time and all round atmosphere condition. Diamond is ground annulus size is distinct, surface roughness of the surface after grinding is different, the bending strength of the spare parts also changes subsequently. When the surface roughness of surface of spare parts of pottery and porcelain such as Si3N4, SiC, AlN the value is made an appointment with when be 1 μ M, the intensity of the spare parts is about to reduce. Exterior surface roughness is worth bigger, bending strength is lower. Additional, load effect time is longer, the fracture stress of spare parts of pottery and porcelain is less, intensity is lower. Normal MARGIN of pottery and porcelain of 30pt" Align=center> project: 0cm 0cm 0pt; TEXT-INDENT: 24.

1pt; LINE-HEIGHT: 30pt">10.

When grinding project pottery and porcelain how is choice diamond ground annulus? Normal > project pottery and porcelain is tall hardness material, the instantaneous concussion that blade of the cutting that wear bead relies on when grinding makes material interior produces crackle, generation brittleness is destroyed and form cut bits. Accordingly, ought to choose grain the strongest pliable but strong, broken the smallest King Kong stone mill annulus. Normal > King Kong has bead of stone mill of natural King Kong (D) , making synthetic diamond wears bead (the Bao Yi making synthetic diamond of SD) and plating nickel or copper wears bead (SDC) . Natural diamond resource is little, the price is high, king Kong stone mill annulus multi-purpose SD and SDC are made. Normal > general King Kong makes corresponding choice according to bond and grinding material. Colophony bond is ground annulus with flimsier wear bead; Metallic bond is ground annulus need coriaceous to wear bead; The SD that colophony bond uses grinds a microstructure to be irregular crystal, nature is fragile, broken sex is big; The SD that metallic bond uses grinds a microstructure to be structure of short thick lump, property strong pliable but strong, broken sex is small. SDC wears bead is to use colophony bond to grind nickel of bead surface plating or copper in SD, reduce the exterior blemish that wears bead thereby, the watch area that wears bead through increasing will increase the retentivity that wears bead. What SDC uses is very much, when grinding Al2O3 pottery and porcelain, grinding efficiency grinds a tower above than using SD double. Normal > grinding project, the diamond that should choose different bond according to the sort of material of pottery and porcelain is ground annulus. Usually, metallic bond is ground annulus comfortable fasten material of pottery and porcelain at the oxide such as grinding Al2O3, SiO2; Colophony bond is ground annulus comfortable wait for blame oxide pottery and porcelain at grinding Si3N4 and SiC. Normal > grinds the pottery and porcelain of 76 ％ Al2O3 with round of grinding bigger porosity with metallic bond, rate of unit width excision is ground for colophony bond about annulus double. And the effect that grinds round of grinding SiC pottery and porcelain with metallic bond is ground as colophony bond however annulus, the reason depends on grinding when the blame oxide pottery and porcelain of this kind of high density, high strenth, of blade of the cutting that wear bead wear away compare bond wear away rate is rapid, easy cause " blunt tine " phenomenon, reason grinds round of effect with colophony bond any better. Normal Align=center> diamond grinds round of Normal >11.

What does the method that improves efficiency of grinding of material of pottery and porcelain have? Normal >(1) uses new-style diamond to grind round of grinding: Develop and use stone mill of new-style King Kong annulus, it is the efficient way that improves efficiency of grinding of material of pottery and porcelain. If special filling is ground annulus (see a picture 12 - 2) , it is the infiltration in grinding round of bond a kind of special filling. Undertake planar grinding to pottery and porcelain of hot pressing Si3N4 with it, grinding comparing rises substantially, also solved raw metal bond to grind at the same time annulus sharp the question that spends difference. When grinding sapphirine, grind annulus durability is ground than raw metal bond annulus raise 30 ％ , the value also reduced treatment surface surface roughness. Normal > still has cast-iron bond to grind annulus, it and colophony bond grind round of photograph comparing, allow a back to be measured to penetration of a cutting tool big, grinding comparing is big also. Cast-iron bond is ground annulus low-cost, draw materials is convenient, it is easy to grind round of nap, nap efficiency is ground than bronze bond annulus tall 75 ％ . Normal Align=center>normal >(2) compound grinding grinds round of filing: This law is to grinding round of flank to undertake shape electric conduction is handled radiating, make grind annulus ask generation with workpiece pulse discharges. This is to rely on to grind turbine instrument purify and rely on to discharge the compound filing of fused purify material. With pottery and porcelain of this law grinding, exterior blemish is small, grinding efficiency is tall. Normal >(3) ultrasonic vibration: Can go up in Al2O3 pottery and porcelain with this law (0.

38mm is thick) treatment ¢1mm alveolus, still can be in 0.

5mm machines ¢0 on large Al2O3 board.

The aperture of 76 ～ 12mm, the handling time of every aperture needs 5 ～ 15s only. Still can machine whorl, groove, small deep hole to wait. Use hollow drilling tool to also can machine the aperture of several millimeter diameter. CNC Milling CNC Machining