Size
Final diameter and tolerance.
PRECISION GRINDING
Internal and external grinding
Finishing of working surfaces after heat treatment.
IDinner surface
O.D.outer surface
Raroughness according to drawing
PRECISION GRINDING
The finish forms the working size after heat treatment
Internal and external grinding is used for consistent seating and working surfaces. The allowance, base and sequence depend on the post-hardening deformation and alignment requirements.
WHAT TO CHECK
Finish surface parameters
Requirements are set separately for each functional area.
Form
Roundness, cylindricity or flatness.
Position
Alignment and runout relative to the base.
Surface
Roughness and no damage.
HOW THE WORK IS CONSTRUCTED
The measurement base must match the logic of the drawing
After the preliminary pass, the available allowance is checked. The finishing pass and measurement are carried out according to the agreed control scheme.
- InstallationSelecting a functional base.
- FinishingRemoving allowance without losing geometry.
- CheckSize, shape and surface.
RESULT
Ready work surface for receiving
Size and roughness are recorded only to the extent required by the inspection of a specific part and batch.
- DiameterActual value.
- GeometryControlled deviations.
- SurfaceCondition of the work area.
BEFORE AGREEMENT
What is specified for a polished surface?
After heat treatment, the working size is assessed along with the allowance, geometry and surface condition. In the assignment, it is necessary to note the location, internal and external grinding zones, requirements for roughness and edges. Inspection is carried out according to the agreed dimensions, and not according to the general appearance of the part.
Bases
Surfaces against which size and alignment are checked.
Zones
Working diameters, ends, transitions and areas without grinding.
Surface
Roughness and acceptable traces of processing according to the drawing.
Measurement
Method, temperature and volume of batch control.
NEXT STEP
Mark surfaces with finishing requirements
Transfer datums, shape tolerances and roughness for each work area.