The treatment means of grinding of vertical of double emery wheel, the treatment Central Africa of other on polishing bearing surface and axis crucial part often has an advantage. Two opposite emery wheel are contacted with workpiece at the same time, offsetted the active force on the axis shortened handling time. Vertical grinder already appeared old. The characteristic of these machine tools is, use the chuck on base to secure work. Main shaft moves up and down and arrive from a side another side, emery wheel because of this grinding the surface of all sorts of workpiece. This kind of design basically is the function that uses gravity -- the weight of workpiece is assumed directly by machine tool base, such, fixed workpiece does not need to need very big clip to hold power in that way like horizontal grinder. The cause of this workpiece that vertical machine tool uses treatment weak point normally and weighs namely. Graph grinder of vertical of this pair of 1 emery wheel can replace 2 axes and four-axle horizontal grinding machine, use at lesser batch axis company of treatment Emag Salach Maschinenfabrik is returned however can expand this one utility, use the concept of vertical grinding at treatment to grow quite, in cylindroid workpiece. Its vertical grinder uses two opposite emery wheel to work at the same time. Its mainest good point is, the axial power that emery wheel produces is apropos and relative, offset each other thereby. Say according to the company, this vertical grinder can replace what 2 axes and four-axle horizontal grinder machine normally to have a lot of bearing the small lot treatment of exterior axis. The treatment advantage of vertical grinding is occupied say, the VTC 315DS of the company is the first vertical grinder that contains two opposite emery wheel. Axis of X of the edge on the compound slideway in independence mixes two grinding main shaft Z axis moves. Workpiece is perpendicular be located in at two main shaft between two axes, lower part is secured by thimble of immobile rear push frame, upper part is secured by portable working head thimble. Such, emery wheel has enough room to contact workpiece, can undertake grinding from or so two side at the same time. When the grinding that has cylinder work is machined, force of the biggest cutting is axial force, general action is on work center line. Axial force may be compared tangential muscularity 3 ～ 4 times. On the grinder of double emery wheel, because two emery wheel are opposite, axial force is offsetted. This can shorten not only handling time, OK still grinding is thin, not quite steady work. Additional, rotated of two emery wheel to still offset relatively tangential the torsion catching clip that force place produces (graph 2) . This simplified to change a course not only, also do not need clamp facility. Change a workbench center that needs to promote upper part only, take away workpiece can. So brief setting process, make the efficiency when the workpiece that grinder adds section chief to amount to 700mm in small lot particularly tall. Graph force of axial of 2 emery wheel (Fn) may compare tangential force (Ft) big 3 ～ 4 times. Because this vertical grinder used opposite emery wheel at the same time cutting, because the design of this machine tool asks taboo is worn high,action is offsetted in the axial force on workpiece crane changes emery wheel, the company still developed a kind of positioner, it has a receiver, contain knife handle of a similar HSK in that way cone. Had this tigidity interface, still can use CBN emery wheel (recommend) undertake infeed grinding and transverse grinding, fore-and-aft grinding, still have grinding axis shoulder and radius. The base of the machine tool is created with Mineralit, mineralit is material of advanced and aggregate granite, it can restrain the vibration in moving process, can bring good exterior quality and longer cutting tool life for treatment. CNC Milling