Fig.17 Part drawing and simulation

Fig.18 Machining & Inspection using OMM system

Fig.19 Distribution of measuring points for Part

6. Conclusion

The OMM using a machine tool does not require the machined object to be moved from a machine tool to a CMM for measurement. Therefore, it is possible to check the machining error on each process. Because of this advantage, the operator can cope with each process actively. This research proposes the method to execute the OMM efficiently for the object which is composed of analytic geometries, thus the results of this study are as follows:

(a) The inspection features were classified systematically for the CAD/CAM feature.

(b) The OMM was performed using the classified inspection feature.

(c) Input variables as the number of measuring points, position and the inspection path were decided automatically for the inspection feature by the respective decision algorithms.

(d) The OMM-Module was connected with DPROM, the operating system of PC-NC.

(e) The feature–based operating module of OMM was developed.

Table 2 Inspection result(position error, mm)

Table 3 Geometry Tolerance(mm, rad)

Flatness Roundness Cylindricity

S1 0.0561

TC1a 0.0031

SC1a 0.0437 0.0438

SP2a 0.0489

SP2b 0.0250

SP2c 0.0456

SP2d 0.0274

SC2a 0.0105

SC2b 0.0201

SC2c 0.0153

SC2d 0.0198

BP2a 0.0158

SP3a 0.0155

SP3b 0.0163

BP3a 0.0125

References

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