Crankshaft is the core component that makes sure engine runs normally, for this, every place on crankshaft if neck of flange end, axial head end, main shaft and connecting rod neck must pass accurate grinding to machine. The CBN emery wheel that uses innovation bond system can offer a solution for above application. Its are tall hardness and wear-resisting character, can offer good material purify rate and nap interval. Graph the crucial part that the crankshaft of grinding treatment place on 1 crankshaft is piston engine, in the engine of car, lorry, autocycle, shipping, aeromodelling, lawnmower, rising to bear concussion load and deliver dynamic main effect. The applied range with wide engine of no less than is same, crankshaft grinding worries provided demand to abrasive also Protean, its prime cause depends on the place that grinding wants on crankshaft differring, include respectively: Axial head is carried; Main shaft neck (contain stop) of neck of the main shaft that choose a side; Connecting rod neck; Flange end. End of crankshaft axis head and the grinding that flange carries are inclined the axial head end to infeed grinding crankshaft and flange end use identical grinding to machine means normally, namely emery wheel with proper point of view inclined enter grinding area to feed (graph 2) . The characteristic of this application depends on outside circle and end panel are having different grinding to contact a condition, when undertaking emery wheel type selecting accordingly, need anatomize these difference. Graph 2 inclined to cut grind emery wheel, the bond that used two kinds of different specifications pursues solution of optimal of crankshaft of treatment of emery wheel of CBN of bond of 3 pottery and porcelain is to use the bond of two kinds of different specifications to make emery wheel, the round bond outside be being used at grinding wants to compare grinding end panel more wear-resisting. When grinding end panel, osculatory area is large, so emery wheel the constituent structure of this part must more open, make enough cooling fluid enters grinding area smoothly, achieve first-rate refrigeration result. Take meanwhile cut bits, prevent workpiece occurrence burn thereby. Just of emery wheel of CBN of bond of solution pottery and porcelain can satisfy these different requirement. Spend like physical hardness, organization on structure of its interiorly organization, the respect such as abrasive chroma has very wide choice range. And it is a few years ago, because their a lot of physics are characteristic what wait like shrinkage is different, only bond of a few kinds of pottery and porcelain can is together by fire. The researcher course that ministry of material of tall function of group of holy dagger class is in center of research and development of world each district tries hard for long, joint development gave a kind of newest bond -- N7. The character of this kind of new bond basically has the following at 3 o'clock: Hard to exceeding abrasive is having wonderful solid knot capacity; Wonderful " bond catenary " appearance maintains a gender; Tall hardness and wearability. Because these are characteristic, present abrasive layer and past photograph are compared, "Bond catenary " thinner but solid knot intensity was not changed however. Come so, constituent structure is opener, the quantity of heat of the generation in grinding process is fewer -- burn problem be readily solved. In numerous and different application, the practice of qualitative, mental allowance and side of exterior character demand already proved the workpiece ability that differs in correspondence for instance, these character of N7 can solve crankshaft grinding effectively to machine medium difficult problem. The axial head end of the crankshaft of grinding no less than of main shaft neck and connecting rod neck and flange end adopt same grinding way same, the grinding of the main shaft neck of crankshaft and connecting rod neck also is very much the same. Go up oneself century since 80 time evening, the treatment method of crankshaft journal had produced fundamental change. With main shaft neck treatment is exemple, best at that time treatment means is to use so called " assorted emery wheel " grinder is machined (at the same time installation is in a group of emery wheel same a) on main shaft. As more driving CBN emery wheel application arrives on crankshaft treatment, realize taller economic benefits to become a possibility. Be aimed at the grinding of neck of crankshaft connecting rod, the application of CBN emery wheel gained a success likewise. Its more it is to use double wheelhead grinder to undertake machining. Of course, undeniable is, can successful from use common emery wheel to change CBN to emery wheel, grinder reached decisive action since the innovation of design concept, this one innovation covers nap technology, cooling system, abrasive layer is cleaned wait for each respects. With efficient the development of the machine tool is synchronous, the design of crankshaft journal also is in produce a change, the grinding means of this countershaft neck also produced main effect. Arrive on century 90 time metaphase, normally crankshaft besides a journal other all journal contain a grooving, and these journal need treatment of grinding of the circle outside undertaking only. Differ to it, present crankshaft is almost all two flank on journal, transfer round horn and outside the circle needs grinding. These new-style crankshaft journal can pass the following 3 kinds of methods undertake grinding: Use undertake infeed grinding with the wide emery wheel such as journal; Use a bit narrower than journal width emery wheel to undertake relying on to grind (Kiss Grinding) ; Union " infeed grinding " and " rely on to grind " undertake diagonally grinding. Regard its as the solution, the CBN emery wheel of bond of use pottery and porcelain is OK very easy and satisfy these special treatment requirement adequately. Besides a few character that narrate besides preamble place, the appearance of its height maintains gender and easy nap character to also be worth to pay close attention to very much. Abrasive of holy dagger class grinds can machine limit requirement to provide system of much money bond according to what differ: (1) is opposite more flexible bond system 43, can be in precision of cooling condition difference, nap is low the job below not quite ideal operating mode condition; (2) is opposite more the bond system of wear-resisting 41 or 95, can offer the oldest material purify rate and the longest nap interval. The to emery wheel of CBN of bond of pottery and porcelain requirement in epilogue grinding treatment is Protean, our conclusion is: Do not have best bond to a kind of any application, have the bond that suits most only. CNC Milling