Shallow the use method in talking about emery wheel to be machined in stone material grinding

001 ～ 0.

005mm; Grinding rate is very high, can amount to V=30 ～ 50m/s commonly; Grinder stiffness is good; Use hydraulic transmission, because of this grinding can economic ground obtains tall treatment precision (IT6 ～ IT5) with small exterior surface roughness (Ra=0.

8 ～ 0.

2 μ M) . Grinding is one of main methods of spare parts finish machining. (3) as a result of acuteness friction, and make grinding area temperature very high. This meeting creates work generation stress and be out of shape, cause workpiece surface burn even. Accordingly when grinding must infuse is many cooling fluid, in order to drop grinding temperature. Cooling fluid still can have a bits and lubricant effect. (4) the radial load when grinding is very big. This meeting causes a machine tool, emery wheel, the stretch concede of workpiece system, make be cut actually deep be less than name to cut deep. When accordingly grinding will be finished, should not feed undertakes light is ground, in order to eliminate an error. (5) grind bead blunt hind, grinding force also increases subsequently, cause wear bead broken or fall off, show sharp point afresh, this character is called " from acute sex " . It is certain to make from acute sex grinding is in on the rails of time internal energy, but after exceeding regular working hours, should undertake artificial nap, lest grinding force increases,cause oscillatory, noise and quality of scathing work surface. Emery wheel of 　 of emery wheel 　 is the cutting tool of grinding, it by a lot of petty and hard grind the poriferous object that bead and bond are stuck and becomes. Grind bead to loading cutting job directly, must sharp have tall hardness, hear resistance and certain tenacity. Commonly used abrasive has alumina (weigh corundum again) with carborundum two kinds. Alumina kind abrasive hardness tall, tenacity is good, fit grinding steel stuff. Carborundum kind abrasive hardness taller, sharper, thermal conductivity is good, but more fragile, suit grinding cast-iron with hard alloy. The emery wheel of same abrasive, as a result of its degree of finish differs, the exterior surface roughness after workpiece is machined and treatment efficiency are not identical, grind bead to be used bulkily at kibble, grind bead to suit essence of life pettily to grind, abrasive heals thick, size number heals small. Bond has the effect of felt abrasive. Commonly used is bond of pottery and porcelain, it is colophony bond next. Bond is chosen makings is different, affect emery wheel be able to bear or endure corrode sex, intensity, hear resistance and tenacity. The felt that wear bead heals prison, fall down not easily from emery wheel more, weigh the hardness of emery wheel, namely the hardness of emery wheel is the grinds an outer master piece to use next desquamation difficult easy degree that points to emery wheel surface. Fall off easily call soft, call conversely hard. The hardness of the hardness of emery wheel and abrasive is two different ideas. By the surface of grinding workpiece softer, the point that wears bead (edges and corners) wear away not easily, the time that rubs bead to use so can grow some, that is to say optional stick receive some firmer emery wheel (the emery wheel with taller hardness) . Conversely, the emery wheel with low hardness suits the work with grinding expensive hardness. Emery wheel works below high speed condition, to assure safety, should undertake checking before installation, not due the blemish such as crackle; To make emery wheel job smooth, before using, should undertake dynamic balancing experiments. Emery wheel job is regular after time, its surface space can be ground bits jams, the acute angle of abrasive can be ground blunt, original geometrical figure will be lack fidelity. Accordingly must nap in order to restore cutting ability and correct geometrical figure. Emery wheel needs to undertake nap with diamond pen. The sort of the structure of planar grinder and grinder of 　 of grinding motion 　 is very much, basically have planar grinder, cylindrical grinder, inside round grinder, all-purpose cylindrical grinder (also can grind inside aperture) , gear grinder, whorl grinder, slideway grinder, inadvertently grinder (the circle outside grinding) with tool grinding machine (grind cutting tool) etc. Here introduces planar grinder and its motion. CNC Milling