As in other Titanium machining operations, it is very essential that the entire machine tool setup and the Titanium component be rigid, to assure a top quality broaching job. It is also recommended that broaches be wet ground, to improve finish of the tool, thereby giving better tool performance. During the broaching operation, vapor blasting with the coolant helps lengthen broach life and reduce the tendency for smearing. There is a tendency for Titanium chips to weld to the tool on an interrupted cut such as broaching, and this tendency increases as the wearland develops. Both the broach and broach slots should be examined regularly for signs of smearing, as this and chip welding are indications of wear. Thus you avoid poor finish, more rapid tool wear and loss of tolerances.
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