The reason for the unevenness of the helical rack

 For mechanical equipment parts, many require precision, but for a number of reasons, the reason for the different surface roughness of the helical rack:
         1. The precision of the machine tool transmission chain is not high. During operation, vibration or shock occurs, which affects the instability of the machine tool transmission.
         2. The worktable spindle does not meet the requirements of the surface of the cone guide surface of the workbench case, the surface of the cone guide is too hard, the workbench rotates heavily, and vibration occurs during operation, causing errors in processing.
         3.let the knife mechanism work is not normal, back knife scraping on the surface of the workpiece.
         4. sharp tooth grinding sharpening.
         5. Inadequate feed rate caused the toothed knife to cut the rack bar not in time, resulting in rough surface of the rack.
         6. the rack blank installation can not rely on, cutting vibration.
         7. Dirty cutting fluid, or into the cutting slot, resulting in unacceptable surface quality of the rack.