The solution of the cylindrical grinder machining surface of helix method

Reason 1: dressing grinding wheel method inappropriate elimination method 1: diamond drill should maintain sharp, and no loose particles, ling but fluid should be fully when finishing, finishing grinding wheel dressing volume shoulds not be too big. Reason 2: the grinding wheel spindle and the worktable with parallelism error too large elimination method 2: using special tool measuring axis parallelism such as super bad, should be adjusted in the production of trial cut method is used to verify the parallelism error: grinding length and the diameter of a cylindrical than moderate, make the taper at the minimum, should be fine grinding, fine grinding the outer round end or ends coated with a thin layer of oil last, width and wheel width, and then cut into the into the trace of feed mill, until the color wheel just contact area, wipe traces a layer of color, if all wipe traces show grinding wheel grinding wheel width busbar and artifacts bus parallel good; Touch if pick up on the right side of the local part indicates that the main shaft bow, if left in contact with the spindle shows up, note: dynamic measurement is better than the static effect is good. Error direction is determined, and the available repair blow was measured gasket. Can fix scraping the grinding wheel rack slide or saddle joint surface plate bottom, if it is hard to trim axis parallelism, can repair diamond drill, make an correction in consistent with that of grinding wheel center, can be reduced due to grinding wheel spindle is not parallel to the surface of the grinding wheel into the hyperbolic line. Reason 3: grinding feed allowance for rational selection should be based on workpiece elimination method 3: grinding feed should choose with workpiece allowance to keep fit, especially should control the coarse grinding workpiece allowance, or caused by excessive hidden helix is displayed in the fine grinding, therefore, must be to improve the surface quality in the process of grinding, keep after dressing grinding wheel often prevent the formation of helix and not eliminated. Reason 4: lathe bed guide rail or grinding wheel rack guide rail straightness error is big, in the plane of the dressing trajectory. Elimination method 4: an installation position and try to make the dressing and grinding location, the same as an finisher in the workbench on the longitudinal position, should choose good finishing position, in order to solve bedway in horizontal plane bending. Reason 5: grinding wheel spindle bearing clearance is big, the dynamic effect of stiffness reduction. Method 5: check the bearing clearance, large adjustment, see the grinding wheel spindle bearing pay '. The head and tail frame causes 6: poor rigidity, bearing the workpiece center hole with the top small contact produce bearing rigidity is poor. Between the top of rotary spindle grinding, can turn the head frame adjustable barrier to zero, tailstock sleeve has a gap phenomenon of major repair. Workpiece center hole to keep big end contact as far as possible, especially cylindrical workpiece with higher accuracy, proposed to center cone length control 3 - contact 5毫米( Center hole bottom intake can be expanded to meet) 。 Reason 7: workpiece material makes the grinding wheel and grinding wheel does not match the cannot effectively removed artifacts, and serious passivation. Method 7: grinding workpiece materials must be properly matched material: generally choose is as follows: the workpiece material for nickel, chromium steel, selection of carburizing steel, tool steel, alumina grinding wheel, K - hardness H； General steel hardness L - J, low tensile strength such as cast iron, brass material choose black silicon carbide. Choose green silicon carbide, etc. When the workpiece phase at the same time, external cylindrical grinding wheel hardness than plane, the inner hole grinding wheel.