CNC Centerless Grinding instances of cylindrical and conical
(A) grinding cylinder
Pictured 2.5-20 parts for the grinding of piston pin diagramWorkpiece material: GCr15Heat treatment: 62HRCGrinding allowance: 0.3mmMachining processes: coarseGrinding methods: through the grindingGrinding wheel: A60JVGuide wheel: A100PRUs: 35m / sUw: 35m/minPallet angle: 30 °Center height H: 14mmGuide wheel angle: 2.5 ° ~ 3.5 ° kibble
Coarse 1 ° ~ 1.5 °Radial feed speed Ur: 0.03mm/min (coarse)The number and distribution of grinding allowance:
Kibble 2 times per touch to 0.1mm
Grinding a half times, rubbed 0.04 ~ 0.045mm
Grinding 1, rubbed 0.005 ~ 0.01mm
Precision: roundness and cylindricity 3μm
Surface roughness Ra: 0.2μm II: grinding conical
Grinding cone cut method used, adjust the machine according to the workpiece and a bevel grinding wheel dressing, guide wheel.
A small angle (1:50 taper pin), as long as the swivel deflection guide wheel frame, the starting angle is equal to 2a (FIG. 2.5-21a), or to dressing the grinding wheel at an oblique angle equal to 2a (FIG. 2.5-21b ), or an oblique angle to the guide wheel dresser equal 2a (FIG. 2.5-21c). Workpiece larger taper, you need to have the grinding wheel and guide wheel trim tapered and having a longitudinal inclination to adopt equal to a pallet (Figure 2.5-21d) when the workpiece inclination is large (a = 5 °), machine scale beyond the allowed range, dressing the grinding wheel and guide wheel angle when they have a need to use the cam (Figure 2.5-21e). When the workpiece angle is large, you should not in CNC machined on centerless cylindrical grinding machine Grinding cone workpiece steps:
1 Select the appropriate hardness, particle size and size grinding wheel and correctly installed.
(2) determine the workpiece mounting height, and select and install the pallet height.
3 piece angled a small, Ru grinding general taper pins, first guide wheel angle in the vertical plane switchman 1 °, diamond dresser angle in the horizontal plane also pull back to 1 °, then trimming guide wheel, according to the workpiece bevel grinding wheel dressing into a cone, the installation files off, file off the longitudinal position of the workpiece to be ground surface length.
4 try grinding workpieces. Grinding method and cut the same law, if the workpiece has setbacks, you need to increase the guide wheel tilt angle, and adjust the guide wheel dresser back to the corner, and re-trimming guide wheels until the workpiece files can be automatically eliminated without snapping back phenomenon so far.
5 Measuring workpiece taper. Available sets of rules or universal vernier protractor, high precision measuring sine round pin available, if the processing of the taper is not correct (ie, a too big or too small bevel) need to adjust the guide wheel frame swivel or adjust the trimmer tilt angle.