Centerless grinding machine processing workpiece surface grain what are the reasons you understand?
In the process of centerless grinding machine, often appear processing workpiece surface with ripples appear, that affects the accuracy, more affect the appearance, according to experience, there are roughly three kinds of situations:
First, the surface appears spiral pattern, the reasons are as follows:
1, in dressing the grinding wheel, the exit place of the grinding wheel convex, the workpiece out of the grinding area just when the bumps grinding to the surface, the formation of spiral pattern. The solution is: you can repair the grinding wheel at the exit more or use a file to round the edge of the grinding wheel at the exit.
2, hold up the workpiece knife plate alloy part of the small cracks, resulting in the surface is not light, the phenomenon of hair pulling. Need to repair the knife plate or replacement.
3, uneven hardness of the bonding agent of the grinding wheel, resulting in uneven degranulation of the grinding wheel, if the repair of sand still can not be changed, the need to replace the grinding wheel.
4, feeding speed or discharging speed and guide wheel normal adjustment of the speed is not consistent (in the case of automatic feeding device is easy to appear). Need to adjust the feeding and guide wheel speed feeding some.
5, the guide wheel in adjusting the tilt angle and playing R with the grinding wheel axis relative position deviation, which needs to be re-focused. Titanium Hao machinery is a machine tool thimble, toolholder toolholder, shaft machining, CNC numerical control machining, spindle screw, collet connecting rod, non-standard parts processing as the company's main products.
Second, the surface of the oscillation pattern: mainly machine tool itself has vibration or workpiece grinding process of oscillation.
1, the grinding wheel itself is not stable, may be the grinding wheel flange clamping is not correct, or dynamic balance is not adjusted. This requires a new installation of the grinding wheel and mobilize the balance.
2, the spindle bearing wear or bearing adjustment is not appropriate, drive grinding wheel vibration. Should readjust the bearing clearance or replace the bearing.
3, the vibration of other equipment to the grinder caused by resonance, need to stay away from other sources of vibration or dig anti-vibration ditch.
4、Because of the cushion wood to support the knife plate to increase the center height, the workpiece through the knife plate is not solid vibration. Need to tighten the screws to fix the knife plate.
5, the grinding wheel spindle is driven by the motor through the triangle conveyor belt, the length of the triangle belt is not the same or wear and tear, caused by machine vibration. Need to check and replace.
6, the center of the workpiece is too high, the grinding wheel through the grinding force to make the workpiece pressed to the knife plate, the guide wheel of the force is reduced, causing uneven force on the workpiece, resulting in vibration. At this time, the knife plate center should be reduced.
Third, the surface has irregular grain scratches: this is mainly the use of grinding fluid and filtration system has a problem, resulting in the grinding wheel dropped particles and abrasive debris in the grinding fluid circulation and scratches on the surface of the workpiece. At this time should replace the grinding fluid, or increase the filtration device.