Efficient development of the processing technique that wear bead and crucial technology

G.

Professor Werner writes civil prophecy efficient the rationality that grinds area existence greatly, initiated from this efficient the concept that grinds greatly. German Bremen university is contributive 1983 made by company of German Guhring Automation at that time the first efficient the grinder that grinds greatly, power is 60kW, rotate speed is 10000r/min, emery wheel diameter is 400mm, circumferential speed reached emery wheel 209m/s. Speed of grinding of lab of Aachen industry university already achieved 500m/s, this one speed already broke through the working limit of current machine tool and emery wheel. The linear velocity of grinding of CBN emery wheel that Swiss Studer company develops is in 60m/s above, develop to direction of 120 ～ 130m/s. 60 time metaphase of American begin to increase the linear velocity of emery wheel of pottery and porcelain, nuo paused 1967 the emery wheel that the company sells linear velocity is 61m/s in the market and grinder. Arrive at the beginning of 70 time, the grinder of 60m/s already had quite amount, 70m/s, the grinder of 80 M/s and even 90m/s also appears in succession. 1993, the freeboard that Edgetek Machine company of the United States rolls out first fast grinder, use monolayer CBN emery wheel, circumferential speed achieved 203m/s, temper by dipping in water of treatment of in order to is hard toothed etc can achieve very high metallic excision rate. Research of grinding of American Connecticut university and the inadvertently cylindrical grinder that develop a center, 250m/s of highest grinding speed. City of Zhu Sai of American horse Sa established the S of the university 2000.

The person such as Malkin, with the emery wheel speed of 149m/s, plating diamond emery wheel carries use electricity grinding nitrogen changes silicon, study the landforms of emery wheel and grinding mechanism. Efficient grinding grinder of the United States is very at present general, basically be applied CBN emery wheel. Can achieve the rate with 160m/s, of 75mm3/mm · S grind except rate, undertake efficient grinding to Incone1718 of high temperature alloy, 2µm of ～ of the Ra1 after treatment, 13µm of ± of dimension public errand. Use the emery wheel of CBN of pottery and porcelain of diametical 400mm additionally, with the speed grinding of 150 ～ 200m/s, can achieve RaO.

81µm, ± of dimension public errand 2.

5 ～ 5µm. Direction of a of grinding of American high speed important research is small loss grinding advanced ceramics. Japanese freeboard fast grinding basically is not with obtaining Gao Sheng yield is a purpose, and be interested in the integral performance of grinding process more. 70 time metaphase of Japanese, with respect to the high speed grinding machine that can produce 45m/s and 60m/s. 1985 around, on cam and crankshaft grinder, grinding speed achieved 80m/s, 90 time Japan rolled out the high speed grinder of 120m/s and 250m/s. Japan replaces general emery wheel with CBN emery wheel widely, its purpose is those who obtain treatment is efficient change, save labour and nobody are changed. To 2000, the freeboard that Japan already undertook 500m/s fast grinding experiments. The person such as Shinizu, to achieve freeboard grinding rate, use change the grinding machine that make, stand side by side two main shaft together; regards emery wheel as the axis, another regards workpiece as main shaft, make its are nodded in grinding tangential speed is contrary, obtained the result that is Vs+Vw relative to grinding speed, the grinding linear velocity between emery wheel and workpiece is close to L000m/s actually. This is up to now, publish highest grinding rate of the report. Grinding of our country high speed starts later, began to popularize technology of high speed grinding 1958. Zhengzhou abrasive ground a grinding institute and Luoyang tractor 1964 factory collaboration undertook grinding of 50m/s high speed experiments. Zhengzhou abrasive ground a grinding institute to undertake the grinding of 50 ～ 60m/s experiments 1974, in October 1982, hunan university undertook experiment of craft of puissant cam grinding studies 60m/s high speed, provided experimental data to develop grinder of camshaft of high speed heavy-cut grinding and emery wheel of high speed heavy-cut grinding. At the beginning of 80 time, northeast university undertook experiment of many high speed grinding studies. The YLM that gives priority to development with northeast university, 1 model double-faced vertical is semi-automatic long wear product line, grinding speed achieves 80m/s, grinding pressure is in above of 2500 ～ 5000N. 1995, factory of Hanjiang machine tool uses emery wheel of CBN of pottery and porcelain, the freeboard that undertook 200m/s fast grinding experiments. The Guangxi university grinding experiment at the surface roughness of high speed low surface that around began 80m/s 1997 considers to work. To Hunan university was in all the time 2000 begin high speed grinding to study the work. 2000 on exhibition of machine tool of Chinese numerical control, hunan university rolled out highest linear velocity to amount to the grinder of numerical control camshaft of 120m/s. Begin from 2002, hunan university begins to exceed system of main shaft of high speed grinder to undertake high speed exceeds high speed to consider in the light of a 250m/s, undertook in home magnetism float bearing is designed first. 90 time come 20 centuries now, northeast university is in all the time begin the research that exceeds technology of high speed grinding, develop a success above all 55kW of 200m/s of the first circumferential speed of our country, rated power, the freeboard that linear velocity of highest emery wheel amounts to 250m/s fast experiment grinder, undertook CBN exceeds high speed emery wheel exceeding activity of grinder of high speed high-power to press research of main shaft system, 200m/s to eletroplate early or late design and make, exceed high speed grinding to become bits mechanism research, freeboard, the part studies achievement achieves international achievement of research of advanced level, part and international level keep balance. Sudden drop grinding nods grinding quickly (Quick - Point Grinding) is a kind of when was developed 1994 by German Junker company Mr Erwin Junker and obtain patent advanced freeboard fast grinding technology. It is compositive exceed high speed grinding, CBN exceeds hard abrasive and CNC flexible process 3 old advanced techniques, have good treatment performance, it is to exceed technology of high speed grinding to produce the another new development of respect of high quality stability in efficient, Gao Rou sex and big batch. This craft basically is used at the axis, dish kind of spare parts treatment. Its CBN or making synthetic diamond exceed axes of hard abrasive emery wheel to form certain dip angle in level and perpendicular direction and workpiece axes, use thin emery wheel and workpiece to form small area point contact, use technology of successive contrail numerical control integratedly, in order to exceed high rate grinding, OK and amalgamative car grinds working procedure. It has the versatility of CNC Turning and Gao Rou sex already, have taller efficiency and precision again, emery wheel life is long, quality is very stable, it is new generation CNC Turning and the admirable union that exceed high speed grinding, become one of main technique forms that exceed high speed grinding. At present the research in this new technology develops Germany to be in lead position. Already got applied in manufacturing industry of foreign auto industry, tool at present, machine a domain in car spare parts especially, age namely axle or camshaft. These spare partses include to cut person, journal, axis mostly shoulder, prejudicial reach whorl grinding process, it is OK to use this technology hold clip through and realize full treatment, raised a spare parts to machine precision and productivity greatly. Make in gear cutting, machine tool, spin and printing machine instrument are made, there also is wide application perspective in industry of treatment of pottery and porcelain, electron. Car of our country part made an enterprise also introduce a few this one technological equipment at present, gained apparent benefit. But applied domain is still small, be confined to a car to start crankshaft kind the treatment of the spare parts. Because home does not have the craft theory that develops a system and applied research at present, did not master its core technology and theory, cannot master craft parameter design and process designing skill, cannot emery wheel of production of form a complete set and relevant accessory, can break by foreign ridge in a field with respect to onefold spare parts only custom-built, all craft and equipment all rely on an entrance. And abroad because technical forestall, the theory that to nodding quality of grinding mechanism, rule, grinding quickly control reachs dot grinding craft to wait for thorough system and experimental research and relevant technology information also did not see more story. Accordingly, dog international advanced technique, deep person begins the theory that selects grinding technology quickly and applied research, be popularized to be in our country and develop it is this advanced technique, important to raise workmanship technology and equipment to make a level have meaning. Domestic northeast university already began to undertake research and machine tool are developed exceeding high speed to nod grinding mechanism. Grinding of feed of delay of delay feed grinding also calls deep-felt delay feed heavy-cut grinding, its characteristic is to use big cutting deepness (1 ～ 30mm, bigger than common grinding 1 ～ 1000 times) with very minor workpiece feed rate (3 ～ 300 Mm/min, it is the 1/100 ～ 1/1000) of common grinding. Delay feed grinding increases the length that worry bit greatly through increasing emery wheel to cut, grind high in order to obtain except rate (tower above is common grinding) of 5 times above. This method has dominant place in planar grinding, basically use in grinding groove to mix shape the surface. In recent years heart, flower, the country such as beautiful, day and Switzerland developed grinding machine of a series of figuration of special delay feed, especially the application of ball guide screw and technology of linear electric machinery more those who promoted technology of delay feed grinding is practical change. Is the characteristic of delay feed grinding as follows: ? Tuan of Ba of ハ of flatter of take along sth to sb of S of to fold of arrow of commonplace ば  however  of Tiao an ancient drinking vessel oh  of Wu Chu of  of ぜ of grave of Shan of  of left-eyed flounder of Qiao of deep and remote ハ of benzene of calamity of tip of silk of Ge of  of Bo of Tiao of  of J of where チ of Jian of Xing of care of short for Weihe River of generation of  of  of cherry of Mian of セ 〕 ぴ is ticked off. Because can machine figuration to semifinished product, reason can solve material of a few difficult treatment effectively to machine a problem, for example treatment of surface of figuration of gas turbine lamina, the grinding of high temperature alloy, stainless steel, high-speed steel face or groove, its efficiency compares milling second year in high school more than 10 times. With chamfer of rotor of vavuum pump of grinding of feed of delay of CBN emery wheel, compare milling efficiency not only tall, , and treatment quality is good, cost is managing loss of concussion of emery wheel of 40% or so; is small, workpiece appearance precision is stable. Because delay feed and travel time decrease, reduced emery wheel and workpiece margin collide frequency and hit level, prolonged the service life of emery wheel, temperature of the muscularity of generation; grinding that also reduces treatment surface ripple to spend, grinding is high, cut bits to grow and be out of shape badly in grinding area, easy jam emery wheel. Because grinding of this delay feed adds man-hour,must furnish adequately many cutting fluid, in order to drop grinding temperature, make sure; of grinding surface quality machines precision to amount to 2 ～ 5µm, ra0 of exterior surface roughness.

1 ～ 0.

4µm. Efficient and deep-felt grinding (HEDG) is efficient grind greatly (High Eficiency Deep Grinding, HEDG) technology is the high rate of emery wheel of a kind of collect that in last few years development rises (speed of 100 ～ 250m/s) , tall feed (0.

10m/min) mixes 5 ～ to be cut greatly deep (0.

What 1 ～ 30mm) is an organic whole is efficient grinding technology. Efficient grinding a concept greatly is by Werner of German Bremen university the professor founded 1980. At present European enterprise is in efficient grind technical application respect greatly to occupy lead position, efficient grind greatly can regard delay feed grinding and the union that exceed high speed grinding as intuitionisticly. What differ with common grinding is efficient grind greatly can carry distance of a grinding, the past that finish by car, mill, grind the process of thick finish machining that waits for composition of many working procedure, obtain the metallic purify that common grinding machines outclass to lead (grind except rate is higher than common grinding 100 ～ 1000 times) , exterior quality also can reach common grinding level. Because it uses grinding of the feed that compare delay to get much feed rate quickly, manufacturing efficiency rises substantially. Give 200 ～ 300m/ in the development on foundation of CBN emery wheel further again later. exceed high speed to grind grinder greatly. Use emery wheel of bond of pottery and porcelain the speed grinding with 120m/s, compare grinding rate to be able to amount to S of · of 500 ～ 1000mm3/mm, 5 times taller than turning and milling above. What England used dish of form CBN emery wheel to undertake 146m/s to low-alloy steel 51CrV4 is efficient grind an experiment greatly to consider, material purify rate exceeds 400mm3/mm · S. FD613 of company of German Guhring Automation exceeds grinding machine of high speed plane, speed of feed of the workbench when the rotor chamfer of wide 1 ～ 10mm, deep 30mm amounts to 150m/s and CBN grinding 3000mm/min, on 125m/s groove grinder, the broach groove of grinding deep 20mm can be finished, the metal grinds a rate to amount to 500400mm3/mm · S. Efficient figuration grinding serves as efficient one kind when grind greatly also gets applied extensively, and but system of CNC of have the aid of and CBN become molding sand annulus to finish more complex model the treatment of the face, exterior quality can be rivalled with common grinding. This technology is used successfully at groove of chamfer of guide screw, screw, gear, rotor, tool to wait to be machined in order to grind Dai Xi. Contrast of parameter of craft of method of common grinding, delay feed grinding, efficient and deep-felt grinding sees next tables. Contrast of parameter of craft of common grinding, delay feed grinding, efficient and deep-felt grinding expresses parameter grinding of feed of common grinding delay is efficient and deep-felt grinding Ap(mm)0.

001 ～ 0.

050.

1 ～ 300.

～ of 1 ～ 30Vw(m/min)1 300.

05 ～ 0.

50.

6020 ～ of ～ of 5 ～ 10Vs(m/s)20 S)0 of · of 6080 ～ 200Zw(mm3/mm.

1 ～ 101.

1050 ～ of 0 ～ fluid of 2000 grinding of emery wheel WA60HVWA60HVWA60HV water of fluid of grinding of sex of oily dissolve of fluid of water radical grinding base barren of bear of the first month of grinding fluid high speed grinds heavy load barren is with older law to repair the grinding method that grinds pressure to excise mental allowance to be a purpose quickly, apply to billet long grind, of casting, forging clear and the kibble of armor plate, grind the 3% ～ that take billet quality commonly except metallic quantity 7% . Do not need nap emery wheel commonly, grinding speed is in normally 50 ～ L00m/s, the law is in commonly to grinding force 2.

5 ～ 15kN, the metal is ground except rate amount to 1000kg/h, grinding power is 100 ～ 150kW commonly, achieve 300kW individually. This technology develops in recent years faster, emery wheel linear velocity achieves 80m/s generally already, some is as high as 120m/s. Filing can amount to 10000 ～ 12000N to force, be as high as 30000N; material to grind even except rate can amount to 500 ～ 600kg/h, highest can amount to 1000kg/h. Heavy load barren grinds a machine tool to implement automation basically already, the law changes to what pressure can follow feed rate and self-correcting can maintain emery wheel rotate speed constant, raised barren to grind manufacturing efficiency greatly. Northeast university from? 0 time begin to undertake high speed weighs bear billet barren to grind an experiment to consider, built complete high speed to weigh bear barren to grind academic system, returned development to develop in recent years with Yu Gang base builds the shunt-wound robot that grind automatically, most overhaul grinds pressure to amount to 2520N ～ 5000N, the biggest metal is ground except rate amount to 1780g/min. The technical characteristic that heavy load barren grinds includes: (Speed of 1) grinding pressure, emery wheel and metal are ground except rate power of tall, grinding is great, the heavy load barren that asks the machine tool has enough stiffness and intensity;(2) to use high strenth, tall hardness and thick size grinds emery wheel. All use the tall tenacity abrasive such as colophony bond and corundum of palm corundum, microcrystalline corundum, agglomeration and wrong corundum commonly, exceed strong level hardness, and emery wheel does not need nap;(3) to use means of dry type grinding. Arenaceous belt grinding is arenaceous in taking grinding to serve as a kind to be machined in material surface nicety, having, "All-purpose grinding " and " cold conditions grinding " the new-style besmear that say adds grinding craft, in modern production industry, its had been regarded as coequal and as important as emery wheel grinding indispensable treatment method. In industrial developed country, arenaceous belt grinding application already very general, arenaceous belt grinder is caught the quantity has been close to emery wheel grinder stage by stage, its production value is compared it is 1:1 almost. Go up oneself century since 60 time, electrostatic plant arenaceous technology gain new headway, make beautiful, flower, the national arenaceous belt such as day, heart makes technology and arenaceous tape grinder obtains great progress. Have a quantity to already was close to emery wheel grinder, its production value to be 49:5 than the United States1, german 45:55, japanese 25:75, arenaceous belt grinding quantity already occupied grinding to always machine quantity half above, besmear is added grind a treatment to already became a developed country to acquire high specified number the important step of economic benefits. The United States 3 famous arenaceous belt the arenaceous area that the group develops more than 40000 kinds of norms, 55 companies produce arenaceous tape grinding machine tool. Current, whole world country produces nearly 400 thousand arenaceous tapes every year grinder and nearly 95 million square metre is arenaceous belt. Arenaceous belt grinding is current along puissant, high speed, efficient develop with nice way, if Japan is at the beginning of 90 time,use electrophoresis adsorption phenomenal development exceeds successfully small wear an arenaceous belt, the precision that treatment is like the brittleness material such as accurate pottery and porcelain, quartz, silicon chip can amount to ten accept rice, can realize plasticity means grinding. A kind of when the United States produces arenaceous belt the workload that grinder can finish 5 milling machine, carry milling cutter to process cast-iron bearing form with hard alloy before, every handling time is 4.

8min, use puissant arenaceous belt grinder, handling time decreases 0.

8min, a year but managing treatment is expended 4.

50 thousand dollar. Our country arenaceous belt grinding research and besmear are added grind make start later. In recent years partial college and scientific research school developed arenaceous area grinding technology research and development. "75 " during by Zhengzhou 3 grind place, China in grain industry college and Hunan university were finished jointly " arenaceous belt the experiment of grinding craft studies " tackle key problem task. The arenaceous belt that Beijing University learned an experiment to study metallic wire, lamina face to wait east university of grinding; Chongqing is finished early or late " cycloid is arenaceous bring roll flute technology " , " high accuracy plane is arenaceous bring grinding technology " wait for a project, the near future is opposite again electroanalysis arenaceous tape is composite grinding new technology undertakes study, began pair of engine connecting rod at present end panel and enrage on the west east welding line of line of vitta is defeated by stone is puissant arenaceous belt the research of grinding respect. Hunan university system studied arenaceous belt grinding temperature, 1992 through 190 diesel engine the crock builds plane puissant arenaceous belt appraisal of country of grinding craft experiment. China in grain industry college developed arenaceous area of numerical control of 5 coordinate linkage research of grinding lamina face. University of Hua Dong spin considers to put forward application to exceed arenaceous belt of adsorption of the small electrophoresis that wear bead to realize grinding of brittleness material plasticity recently, with period the breakthrough is arenaceous the precision restriction that carries grinding, realize accept rice treatment. The 2nd emery wheel of our country factory and factory of Shanghai emery wheel introduce arenaceous belt to make whole set technology and equipment from the country such as heart, meaning, Switzerland early or late, produce per year arenaceous belt to be 5 × 106m2 and 6 × 106m2 respectively. 3 efficient technology of key of the treatment that wear bead is efficient the wearability that efficient grinding emery wheel should have had grinding emery wheel, tall dynamic balancing precision, crack resistance, good damp is characteristic, tall stiffness and good thermal conductivity, and its machinery intensity must can bear the cutting force when efficient grinding. Efficient grinding emery wheel can use abrasive of corundum, carborundum, CBN, diamond. Bond can use pottery and porcelain, colophony or metallic bond to wait. The corundum of colophony bond, carborundum, cubic nitrogen turns the emery wheel of boracic abrasive, use speed can amount to 125m/s. Monolayer eletroplates the use speed of CBN emery wheel can amount to 250m/s, 340m/s already was amounted to in the experiment. Speed of grinding of emery wheel of bond of pottery and porcelain can amount to 200m/s. The emery wheel photograph that is the same as other type is compared, emery wheel of bond of pottery and porcelain easily nap. The colophony that spends with high density and photograph of metallic bond emery wheel are compared, emery wheel of bond of pottery and porcelain can produce craft to obtain large-scale porosity through change. American Norton company excogitates chemistry of a kind of have the aid of to stick relay to control the method that wears bead, can make grind bead highlights the height of 50% and do not fall off, its bond tensile strength exceeds 1553N/mm2(to eletroplate nickel radical bond is 345 ～ 449N/mm2) . The Nanjing aerospace university of our country develops monolayer of solder of high temperature drill rod successfully to exceed hard abrasive emery wheel to be heated up in order to reduce grinding, increase grinding comparing, obtained better result. University of industry of A go smoothly is in the aluminium of its emery wheel base dish on what use dissolve shot a technology to realize abrasive layer and matrix is reliable stick receive. Keep sharp in whole service life to assure emery wheel, the structure of emery wheel needs to be helpful for grinding a dissension. Should reach emery wheel from sharp aim, besides the scale that should lower bond as far as possible, optimize the space that wears bead to distributing even. Be opposite for this emery wheel is due a perfect nap technology. Emery wheel nap is one of crucial factors that decide grinding quality, different nap method has different characteristic, in applying consequently, need to consider integratedly to machine the element such as material of condition, workpiece, emery wheel material, in order to choose optimal nap plan. Main shaft and its bearing technology are efficient the function of unit of grinder main shaft decided greatly efficient the limit that grinding machines, consequently, to come true efficient grinding treatment, often ask to emery wheel drive and bearing rotate speed very tall. The high speed of main shaft changes requirement main shaft to have enough stiffness, circumgyrate precision is tall, thermal stability is good, reliable, power comsumption is low, life is long wait. Want to satisfy these requirements, the production of main shaft reachs dynamic balancing, of main shaft prop up (bearing) , of main shaft system lubricate and cool, systematic tigidity is very important. Main shaft bearing can use pottery and porcelain scroll bearing, magnetism float bearing, air is static press bearing or liquid activity presses bearing to wait. Ball bearing of pottery and porcelain has weight light, hot coefficient of expansion small, hardness is stability of the dimension when tall, high temperature resistant, high temperature, anti-corrosive, tall, stretch model measures life advanced advantage. Its defect is production difficulty big, cost is high, more sensitive to tensile stress and breach stress. The highest surface speed of magnetism float bearing can amount to 200m/s, the likelihood becomes future to exceed a kind of choice of bearing of high speed main shaft. The main problem that at present magnetism float bearing exists is stiffness and bear capacity low, the dimension photograph that uses magnet and swing tower is older than passing, the price is high. Air is static press bearing to have circumgyrate precision tall, without vibration, attrition resistance is little, wear well, can the characteristic such as high speed circumgyrate. Use at carry high speed, gently and exceeding accurate circumstance. Liquid activity presses bearing, loss of the power when having load is too big, basically use at main shaft of low speed burden. Efficient grinder high speed is efficient treatment not only requirement machine tool has very high main shaft rotate speed and power, and at the same time workbench of requirement machine tool has very high feed rate and athletic acceleration. Still need to combine a variety of grinding functions as far as possible, implementation can complete all grinding process on a grinder. In addition still ask the machine tool has tall dynamic precision, tall damp, Gao Kangzhen sex and thermal stability, high automation and responsible grinding process. The foundation propping up that grinder bearing component is the component such as emery wheel wearing, head wearing, rear push frame, workbench. Ask it has good static stiffness, move stiffness and hot stiffness. Exceed high speed grinding machine to high speed, have domestic and internationally use polymer concrete (man-made granite) will make lathe bed and pillar, some uses pillar and base cast-iron whole to cast and also become, still have use armor plate weldment, and damp stuff stuff its lumen in order to raise its aseismatic sex, these got very good result. Feed system is one of main index that evaluate high speed to exceed performance of high speed grinder, and the development that exceeds high speed treatment as high speed, used linear servo electric machinery generally domestic and internationally direct drive technology, the linear electric machinery of high dynamic performance combines a number to control a technology. If the linear electric machinery of company of German Xi Menzi is the biggest,feed speed can amount to 200m/min, its are the biggest thrust can amount to 6600N, distance of the biggest displacement is 504mm. When grinding of high speed of technology of grinding juice supply, block up of air current protective screen grinding fluid enters grinding area effectively, put possibly still in the influence of filmy boiling. Accordingly, use the appropriate method that note a person, increase grinding fluid to take the significant part of person grinding area, improve refrigeration and lubricant result, to improving workpiece quality, reduce emery wheel to wear away, all in all. Does commonly used grinding fluid note person method to there is: ? Stop Xin of  of ㄖ of Ning of ship of  of palm of ⒖ of ā of Zhuo of ancient white of crash of ⒏ of rank ⒎ ā lifts person of ê of す ┮ bold Cong of hey of abstruse banner of ⑸ of  tan ā beats ǖ of abstruse location of Piao of every  of ā ⒗  to take  of approach of  of Qiong of Zong of Dong of T Lei   , pair of knife precision of emery wheel and workpiece, emery wheel and nap annulus the nap quality of the dimension precision that will affect work directly to knife precision and emery wheel, accordingly, in exceeding high speed grinding to machine, the online intelligence system that monitor is to make sure grinding machines quality and the main factor that improve treatment productivity. Current, sound launchs a technology to be used successfully already at exceeding the nondestructive of high speed grinding to detect, use all sorts of sound emission source of the generation in grinding process, if emery wheel and workpiece are stretch,contact, emery wheel sticks the burst that receive a dose, emery wheel to grind bead and workpiece to grind, workpiece surface crackle and burn, emery wheel and nap annulus the contact all can emit stretch wave. The element such as the condition of surface of condition of these elements and workpiece material, grinding, emery wheel is having close relationship. The change of these elements can cause the respect such as the amplitude of transmit, spectrum to produce change necessarily, this makes us OK through detecting the change of transmit undertakes differentiate to grinding condition. Because this uses emissive technology to be able to monitor grinding crackle and grinding burn, emery wheel is broken emery wheel wears away, emery wheel and workpiece contact, emery wheel and nap annulus contact, obtained satisfactory result. In addition, work measure precision, appearance precision, position precision and the online monitoring technique that process exterior quality, high accuracy, high reliability, practical powerful test technology and instrument are efficient the crucial technology with grinding indispensable place. 4 epilogue are efficient grinding processing technique is advanced production technology, solved traditional grinding to machine high accuracy, inefficient treatment confine thoroughly, in obtain efficient, high accuracy while, can undertake fast face integrality is machined and reduce cost to all sorts of material and appearance again. Below our country existence condition, strengthen the research of efficient grinding processing technique, promotion and application energetically, the treatment level of mechanical to improving our country manufacturing industry and the port with accelerate new product development to have very principal. The application that exceeds hard data nowadays is increasingly wide, executive high speed is efficient grinding is treatment exceeds hard data and the actor that cut material hard to choose treatment technology. Because exceed hard abrasive to grind provided application, the development of the relevant technology such as fluid of machine tool of nicety of high speed, high-power and development of numerical control technology, new-style grinding and emery wheel nap, high speed exceeds high speed grinding and efficient automation of grinding technology application, grinding and intelligence change the development that waits for a technology, make efficient the treatment that wear bead has more important place in mechanical production domain, have very good development perspective. CNC Milling CNC Machining